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 ↓
O'leary's Gingerbread
Ingredients
Directions
Make the batter
Soften the butter and beat it with the sugar until light.
Gradually stir in the molasses and ginger.
Add the sour milk and the well-beaten eggs.
Mix in half of the sifted flour, then the dissolved baking soda, and finally the rest of the flour.
Bake and serve
Bake in round gem pans, especially if you want to serve it hot.
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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Sugar + molassestop 11% of all pairsSmell alikemoderateCooked together9,225 recipes
Shared aroma: ethanol (alcoholic, ethereal).
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Flour + buttertop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Molasses + gingertop 14% of all pairsSmell alikelowCooked together4,116 recipes
Shared aroma: ethanol (alcoholic, ethereal).
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Flour + milktop 14% of all pairsSmell alikelowCooked together78,219 recipes
Shared aroma: isobutyraldehyde (malty, green).
Flour and butter barely smell alike, yet cooks put them together in 124,287 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 batter together as it bakes.
- Butter
- Adds richness and a tender crumb when beaten with the sugar.
- Sugar
- Sweetens the cake and helps it brown while beating in air for lightness.
- Molasses
- Adds dark color, moisture and a deep sweet flavor.
- Sour milk
- Its acidity reacts with the baking soda to lighten the batter and add tenderness.
- Eggs
- Bind the batter and add structure and richness as they set.
- Baking soda
- Reacts with the sour milk to produce gas that makes the gingerbread rise.
The step that matters
Mix in the baking soda after the flour is partly added. The baking soda must be dissolved and added while the batter is still active so its reaction with the acidic sour milk lifts the cake. Adding flour in stages keeps the batter evenly mixed so the leavening is distributed and the texture stays light rather than dense.
Swap the ginger
How well each one fits the dish's main ingredients (flour, butter, sugar, molasses, milk, egg):
- Cinnamonfits better
- Nutmegfits better
- Gingerthe original
- Allspicefits about as well
Fit is the average pairing score against flour, butter, sugar, molasses, milk, egg. Candidates are from the same food group and used in at least 100 recipes.
“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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