Why it works: Butter and milk are a kitchen classic. They rank in the top 7% of all ingredient pairs, and cooks put them together in 81,283 recipes. Both carry (z)-4-heptenal, which smells biscuit, cream. The science ↓
Birthday Cake
Ingredients
Directions
The book says “a moderate oven”. The 350°F (175°C) in the steps is the modern equivalent, not the book's own figure.
Prepare the batter
Preheat the oven to 350°F (175°C).
In a large bowl, cream together the butter and brown sugar.
Add the eggs, molasses, and sour milk, mixing well.
In a separate bowl, combine the flour, baking soda, cinnamon, and cloves.
Gradually add the dry ingredients to the wet mixture.
Fold in the raisins, currants, and citron, dusting the fruit with flour to prevent sinking.
Bake
Pour the batter into a 6-quart pan.
Bake for 3 hours.
Transcribed from a scanned cookbook and modernised for today's kitchens. Where the book gave no heat or time, or said "a moderate oven", the temperatures and times here may be modern equivalents rather than the book's own figures.
Explore the science
The flavor team
The pairs that carry this dish. Each one is judged two ways: how much their aromas overlap, and how often cooks already put them together.
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Butter + milktop 7% of all pairsSmell alikemoderateCooked together81,283 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
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Flour + cinnamontop 9% of all pairsSmell alikemoderateCooked together17,341 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Milk + cinnamontop 10% of all pairsSmell alikemoderateCooked together12,655 recipes
Shared aroma: cuminaldehyde (Spicy, cumin).
-
Sugar + cinnamontop 10% of all pairsSmell alikelowCooked together30,779 recipes
Shared aroma: guaiacol (smoky, sweet).
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Sugar + molassestop 11% of all pairsSmell alikemoderateCooked together9,225 recipes
Shared aroma: ethanol (alcoholic, ethereal).
Sugar and cinnamon barely smell alike, yet cooks put them together in 30,779 recipes: they work on texture and structure more than aroma.
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Flour
- Forms the structure that holds the cake together as it bakes.
- Butter
- Adds fat for a tender crumb and rich flavor.
- Eggs
- Bind the batter and add structure and richness.
- Baking soda
- Reacts with the acidic sour milk and molasses to help the cake rise.
- Molasses
- Adds moisture, dark color, and a deep sweetness.
- Sour milk
- Its acidity reacts with the baking soda to lighten the batter and tenderize the crumb.
The step that matters
Folding in the fruit. Heavy raisins, currants, and citron tend to sink to the bottom during baking. Lightly dusting them in flour helps them grip the batter so they stay suspended through the bake.
“What each ingredient does” and “The step that matters” were written by Claude from this recipe’s own method and reviewed in samples by CompKitchen.
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