Smell & Tell Event | AI, Machine Learning and Smells!

Spock smells "the spores" and sees the future.

Smell & Tell | AI, Machine Learning and Smells! 

Date: Wednesday, September 20, 2023 

Time: 5:30PM-7:30PM 

Location: Ann Arbor District Library (Downtown) 

Address: 343 S 5th Ave, Ann Arbor, MI 48104 

Phone: 734-327-4200

You really need to think like a Vulcan when it comes to prognostication and AI. The future is unknown and as such is subject to fantasy, ideology and cow pies. This is especially true of the intersection of smell, machine learning, and artificial intelligence. 

Machines that analyze smells aren't new. The pairing of Gas Chromatography with Mass Spectrometry (GC-MS) was demonstrated in 1955-56 by Dow scientists in Midland, Michigan. The technology, which is used to analyze individual components of complex mixtures in analytical chemistry labs, continues to evolve. 

We'll explore eclectic smell terrain and collectively follow our nose to get a better understanding of how humans evaluate smells against the capacity of machines that analyze complex mixtures and their components. 

The Smell and Tell series of art+science programming is led by Michelle Krell Kydd, a trained nose in flavors and fragrance who shares her passion for gastronomy, sensory evaluation and the perfume arts on Glass Petal Smoke. Smell & Tell builds community through interactions with flavor, fragrance and storytelling. 

Notes:

Nose-forward reading for this Smell & Tell program:

More than meets the AI: The possibilities and limits of machine learning in olfaction by Ann Sophie Barwich and Elizabeth A. Lloyd (2022)

Gas Chromatography - Mass Spectrometry via Dow, Inc. and the American Chemical Society.

Smell & Tell Event | Inside the Olfactory Mind of Steffen Arctander

Mark your calendars! Steffen Arctander is
the focus of an upcoming Smell & Tell 
at the Ann Arbor District Library.

Inside the Olfactory Mind of Steffen Arctander 

Date: Wednesday, October 18, 2023 

Time: 5:30PM -7:30PM 

Location: Ann Arbor District Library (Downtown) 

Address: 343 S 5th Ave, Ann Arbor, MI 48104 

Phone: 734-327-4200

Steffen Arctander was a renowned chemist, perfumer and flavorist. He is best known for authoring Perfume and Flavor Materials of Natural Origin (1960). The encyclopedic book contains more than 500 monographs on natural materials inclusive of aromatic descriptions and classifications to help the user evaluate sensory impressions. 

Arctander’s legacy reaches beyond the pages of his book. He participated in the Danish Resistance when he was a student and worked for British Intelligence during WWII, narrowly escaping capture by the Gestapo. Steffen Arctander appeared on To Tell The Truth in 1964, a gutsy and taboo move for someone in a famously secretive industry.  

The fragrance flight for this program includes novel natural materials. We’ll use Arctander’s descriptors for guidance after blind smelling each one to get a better understanding of ourselves, and Arctander’s enduring legacy as the author of a magnificent “dictionary of smells”. 

The Smell and Tell series of art+science programming is led by Michelle Krell Kydd, a trained nose in flavors and fragrance who shares her passion for gastronomy, sensory evaluation and the perfume arts on Glass Petal Smoke. Smell & Tell builds community through interactions with flavor, fragrance and storytelling. 

Notes:

Locating the footage from To Tell The Truth featuring Steffen Arctander was complicated by the fact that his name is misspelled in the YouTube video as "Contestant #3: Stefan Octander (Perfume expert)". Google search started directing traffic to Arctander's television appearance after I posted a story about it on February 17, 2021.  The transcription on YouTube was worth correcting for posterity. I provided a proper transcription in the article. 

The image that accompanies this post is Spring Garden by Omoda Seiju (1917).

Birthday of Note: Steffen Arctander, Perfumer and Flavorist (September 9)

Steffen Arctander was born in Denmark on September 9, 1919. He is best known as the author of Perfume and Flavor Materials of Natural Origin, which was independently published in 1960. His birthday is the perfect time to reflect on his unique and atypical career. 

Arctander was one of the founders of the Society of Cosmetic Chemists of Denmark (Dansk Kosmetic-Kemisk Selskab) in 1955, when he was chief chemist and perfumer at Co-Ro Manufacturing (the company was focused on flavor essences for mineral water and ice cream during his tenure there). 

He moved to the United States two years later to join the perfume and essential oils division of the Colgate-Palmolive Company. He created the first college-level course in perfumery at Rutgers University the same year (1957). Rutgers currently offers four courses (master's degree level) related to fragrance and personal care, which is a testament to Steffen Arctander's legacy. 

The formation of International Flavors and Fragrances (IFF) (the result of a merger between Polak and Schwarz, and Van Amerigen and Haebler in 1958) led to Arctander's role as perfumer and head of the odor quality control department at IFF in 1960. 

Four years later, Steffen Arctander was a contestant on To Tell the Truth, a popular game show that aired on WCBS-TV and taped in New York City. It was the closest Arctander got to fame as a member of the highly secretive flavor and fragrance industry. He was working for IFF at the time.

Arctander's success was shaped by interdisciplinary and autodidactic qualities that magnified his life's purpose on and off the lab bench. He could work on a mint toothpaste formula with the same interest, skill and finesse that he applied to the creation of Blue Diamond perfume* (a personal project). 

Job titles have a way of confining accomplished employees with more than one area of scientific expertise. It's hard to imagine this wasn't the case for Arctander. He understood and applied what it took to create a chemically balanced fine fragrance (perfume), a functional fragrance (e.g. scent used in soap, lotion, detergent) and a functional flavorant (e.g. beverages, toothpaste, extracts). 

What consumer products possessed the mark of his fragrant and flavorful handiwork? We'll never know or infer, as non-disclosure agreements are a permanent roadblock. 

Arctander's expertise in natural raw materials and chemistry allowed him to work across product types and by extension, disciplines. Hands-on experience in the field and the lab gave him latitude in his professional life, and a meaningful legacy after he died on October 29, 1982. 

Perfume and Flavor Materials of Natural Origin is more than a well-researched handbook; it's the essence of Steffen Arctander and as close as the reader will get to his biography. This is evident in content that bookends the monographs on natural raw materials. 

The beginning and end of the book is where the reader learns about the author's approach to fragrance creation and categorization, as well as international travel focused on existing and novel aromatic ingredients. The travel portion is scientifically informed, diaristic fieldwork. 

Happy Birthday, Steffen Arctander. Perhaps we'll know more about you on the anniversary of your birthday in 2023. We have history and memories for now.

Notes & Curiosities:

The image of Steffen Arctander that accompanies this post is from Volume 8, Number 3 edition of the Journal of Cosmetic Science.  The journal was published in 1957 and includes a wonderful article about Florence E. Wall, an award-winning female chemist. 

Steffen Arctander joined the British Intelligence Service during WWII, where he applied chemical expertise in explosives against the Nazis. 

*Steffen Arctander formulated a perfume called Blue Diamond that was released in 1979. There is little of it in circulation. An experiential account of its olfactory qualities is revealed in perfumer Ayala Moriel's Smelly Blog. BTW: Elizabeth Taylor's White Diamonds (perfumer Carlos Benaim, IFF) was released in 1991 and isn't related to Arctander's perfume. 

Baking with Flavor: Spiced Rose Hamantaschen

Bronx bakeries of my youth sold large, unruly hamantaschen. Eating them was a war between front teeth and a solid wall of dry cookie dough that cracked and crumbled with every bite. Elastic textures of apricot, prune and poppy seed filling offered little reward for the effort it took to get to the center of the triangular-shaped pastry. Taking a bite out of the holiday cookie eaten on Purim symbolizes victory over Haman in the Book of Esther. The only thing my friends and I tasted when we ate bakery hamantaschen was irony.

No one should sacrifice teeth or good taste for the sake of eating hamantaschen. Buying one from a bakery is still a gamble to which the offense of preposterous fillings and decorations can be added. What can a person who craves descent tasting hamantaschen do?  

The solution is making butter-based hamantaschen from scratch. Butter supports a light flakey texture in the pastry. Shortening and excess sugar are key offenders in bad bakery hamantaschen (they're responsible for hard textures in pastry that taste of nothingness). Does the thought of tender-at-the-bite hamantaschen make your mouth water and whisking wrist tremble? Just wait until you work the aromatic dough with your hands when you make Spiced Rose Hamantaschen (it's a textural hybrid of piecrust and shortbread).

Hamantaschen dough deserves more attention as a flavor source versus a neutral foundation for pastry filling. Citrus zest and vanilla are used to flavor the dough in traditional hamantaschen. Quality fruit fillings are hard to come by, so it's not uncommon for bakers to make their own by cooking dried plums (prunes) or apricots with sugar and water. The finished product is a concentrated fruit butter called lekvar. The balance of citrus zest and vanilla used in the dough complements the flavor profile of tart stone fruits. 

The recipe for Spiced Rose Hamantaschen follows the style of complementary flavor support in traditional hamantaschen—with a twist. Cinnamon, dried rosebuds, allspice, nutmeg and cardamom (Pereg Mixed Spices for Koobah) are added to the dry ingredients in the recipe. Almond extract and Eden Botanicals Organic Rose Hydrosol (a food grade distillate of essential oil of rose) are whisked into the egg mixture. The unique combination of flavors in the dough is a nod to Mizrahi and Sephardic baking traditions. 

Rose isn't an outlier when it comes to flavor. Like apricot, plum and other stone fruits, the rose is a member of the Rosa genus of plants in the family of Rosacea. Edible seed-bearing fruit from various rose species are called rose hips. They have a tart, fruity flavor profile versus fresh rose petals, which taste like roses smell. Dried pink rose petals have a bright spicy floral character with nuances of delicate citrus. Dried red rose petals have an earthy-musky, fruity-floral flavor profile with a touch of warm spice. 

Cracovia Rose Hip Lekvar is an exquisite filling used in Spiced Rose Hamantaschen. The imported Polish lekvar is a popular filling for paczki (donuts) and kolaczki (cookies), which is why it's easy to find at local Polish food shops across the country. The ingredient list includes: apples, plums, chokeberries and rose flavor (the latter possesses an exquisite citrus-floral quality that's similar to the character of rose aroma in Eden Botanicals Organic Rose Hydrosol, which is made from pink Rosa damascena flowers). 

Recipe Origin & Adaptation for Spiced Rose Hamantaschen

Spiced Rose Hamantaschen is an adaptation of a hamantaschen recipe in Maida Heatter's Cookies (Andrews McMeel Publishing, 1997). I've changed the flavor structure and edited the instructions. Anyone using this recipe may increase the number of cookies by using a 2.75 inch pastry cutter (48 cookies give or take). The single jar of rose hip lekvar will work for both cookie yields as long as the filling is leveled before being placed on the dough rounds (you won't need more because it's packed with flavor).

The baking temperature is reduced from 400 degrees to 375 degrees for optimal pastry texture (you can always increase time based on oven temperament or bake at 400 degrees). Forming hamantaschen on parchment-lined cookie trays after cutting rounds on a pastry mat replaces instructions to form pastry in hand (the latter doesn't work). Using all-purpose flour with too much protein will cause the dough to fall apart when you form hamantaschen and it can't be remedied. Guidance regarding flour protein content is included below the ingredients list. A mixer isn't needed for this recipe.

Spiced Rose Hamantaschen

Recipe by Maida Heatter

Flavor Development/Instruction Modification by Michelle Krell Kydd

Yield: 27 cookies

Ingredients 

• 2 cups unbleached, all-purpose flour (sifted)* 
• 2 tsp double-acting baking powder (aluminum-free)
• 1/4 tsp sea salt (fine ground) 
• 3/4 cup granulated sugar 
• 2 tsp Pereg Mixed Spices for Koobah
• 1 stick of cold, unsalted butter 
• 1 large egg 
• 1 tsp almond extract 
• 1 tsp Eden Botanicals Organic Rose Hydrosol (or 1/4 tsp of a commercial brand like Cortas as it's very strong)
• 1 jar of Cracovia Rose Hip Lekvar

*Be sure to use unbleached all-purpose flour that contains 3g of protein per 1/4 cup serving of flour. Some all-purpose flours have upwards of 3g of protein per serving, and hamantaschen pastry dough will not hold together at high levels of protein. Read the nutrition label on the bag of flour to ensure baking success.

Instructions 

• Sift the flour, baking powder, salt, sugar and Koobah spice into a large mixing bowl. 
• In a small bowl, beat the egg with almond extract and rosewater. Set aside.
• Cut the stick of butter into small cubes by cutting horizontally, then vertically. Add cubed butter to the dry ingredients and coat them. Press the cubed pieces of butter flat to form petals. Combine the butter petals with the dry ingredients until the mixture resembles coarse crumbs. 
• Make a well in the center of the bowl with the dry ingredients and add the wet ingredients. Mix the dough with your hands until it is completely moistened. Gently work it in the bowl and form a single mound of dough that holds together well (it will feel less cohesive than typical cookie dough, which changes after refrigeration). 
• Separate the single mound into two mounds of equal weight. Wrap each one in plastic wrap and place them side by side in a gallon-sized plastic bag with a zip seal. Refrigerate the dough overnight for a minimum of six hours to a maximum of 18 hours (longer is better for flavor).
• Line two cookie trays with parchment paper when the dough is ready to use. Set aside.
• Work with one half of a mound of refrigerated dough at a time, keeping the other half refrigerated. 
• Roll the dough into an even 1/8-inch thickness on a pastry mat, working quickly as the dough tends to be sticky (short quick rolling helps). 
• Cut the dough into rounds with a plain or scalloped 3-inch cookie cutter. You’ll fill the dough and shape it after you cut 7 rounds. (Each half a pastry mound yields approximately 7 cookies). 
• Move the rounds to a parchment-lined cookie sheet using a long confection spatula (a small, flat silicone cookie spatula will also work as it's flexible). 
• Scoop a teaspoon of the filling using a one-teaspoon measuring spoon, removing the excess filling from the bottom of the measuring spoon (a form of leveling) and adding the excess filling back into the jar. 
• Place the leveled filling into the center of each round using an additional spoon to scoop it out.
• Make a triangle shape by folding up two sides of the dough (each side is equivalent to a third of the circle) and pinch the corners together where they meet. 
• Fold up the third side and pinch together at both sides, forming a triangle and leaving an opening at the top (don't close the center). The filling should be just above the top of the pastry. 
• Continue rolling, cutting, filling and shaping the dough rounds until you've finished using all of the refrigerated dough.
• Adjust the arrangement of hamantaschen so that each one is 1 1/2 inches apart (1 inch for cookies made with a 2 3/4 inch pastry cutter) when you're done. Take advantage of the geometry of the cookie, as triangular shapes can be placed at different angles without touching while baking.
• Divide the oven racks into thirds and preheat the oven to 375 degrees. 
• Bake for 12 minutes, reversing sheets from top to bottom and back to front after the first 6 minutes. The cookies should be barely colored on the sides, slightly darker on the edges. Add 1-2 minutes if needed, based on the temperament of your oven.
• Move the baked hamantaschen to cooling racks and allow them to them cool completely. Store them in an airtight container between layers of parchment paper for 24 hours before eating. The resting period allows the flavors to meld. 

Creating memorable flavor combinations requires patience and imagination. You never know what can happen when you find an ingredient that inspires you. Case in point. Food writer Heather Eddy fell in love with the lemon-vanilla-orange blossom bouquet in Fiori di Sicilia. She liked it so much she decided to wear the flavor extract as perfume because it's made of food grade essential oils. If this rings your hamantaschen bell here's a little inspiration for you. Fiori di Sicilia is an olfactory cousin of Eau de Cologne. Imagine what Fiori di Sicilia infused hamantaschen dough filled with bergamot marmalade or lemon curd would taste like. 

Notes & Musings

Pereg Mixed Spices for Koobah is available online at Pereg Gourmet ($8.60 for 3.5 oz). The spice mix can be used in savory and sweet applications. If you'd like to substitute a variation of the spice blend that you can make at home, follow the proportions in the ingredient listing for Koobah located in the fifth paragraph of this post. Be sure to use Ceylon cinnamon as that is the type used in the spice mix. Organic pink rosebuds can be purchased from online spice shops. You'll have to separate the petals from the stem at the base, which is a lovely thing to do. 

Eden Botanicals Organic Rose Hydrosol is available online at Eden Botanicals. The recommended purchase size is 4 ounces ($14.00) as it needs to be refrigerated after opening. Rose hydrosol can be used to flavor coffee, tea or hot chocolate. (It also makes a great face toner and is lovely when sprayed on bed sheets before going to sleep, so go up a size if it's something that appeals to you.) 

Cracovia Rose Hip Lekvar is available online at the Polish Art Center in Hamtramck, Michigan. It's fresh and competitively priced ($3.80 for a 12.34 oz jar). Note to sharp-eyed readers of ingredient labels: rose hips aren't listed on the jar of Polish rose hip lekvar. This is permitted by European Union regulations when the amount of a specific fruit in a mixed fruit jam is under 2%.  

Jam is thinner than preserves, and has a tendency to leak out of the hamantaschen pastry while it's baking. If you choose preserves for your hamantaschen recipe make sure that pectin is included in the ingredient list (it’s a natural fruit-based gelling agent).

The best rose preserves are made with sugar, rose petals, lemon juice and pectin, but they lack the thickness required for hamantaschen filling (they'll weep in the oven). If you're a determined experimenter, hack a jar of Maharishi Ayurveda brand Organic Rose Petal Spread and turn it into lekvar with other ingredients.

Photo of Spiced Rose Hamantaschen on a plate by Michelle Krell Kydd. All rights reserved. Ingredient image collages created with various Creative Commons photos from Pixabay. Image of person pouring flour on a table by Mae Mu on Unsplash.