Why it works: Sugar and molasses are a kitchen classic. They rank in the top 11% of all ingredient pairs, and cooks put them together in 9,225 recipes. Both carry ethanol, which smells alcoholic, ethereal. The science ↓
Ginger Cookies
Ingredients
Directions
The book says “a quick oven”. The 400°F (200°C) in the steps is the modern equivalent, not the book's own figure.
Prepare
Dissolve the alum in the boiling water.
Make the dough
In a large bowl, mix the brown sugar, molasses, butter, ginger, baking soda, and dissolved alum until stiff.
Roll out the dough to a thickness slightly thicker than sugar cookies.
Bake
Bake in a 400°F (200°C) oven until hard.
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.
Photo for illustrative purposes only · Contact us to use it
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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Sugar + molassestop 11% of all pairsSmell alikemoderateCooked together9,225 recipes
Shared aroma: ethanol (alcoholic, ethereal).
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Molasses + gingertop 14% of all pairsSmell alikelowCooked together4,116 recipes
Shared aroma: ethanol (alcoholic, ethereal).
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Sugar + gingertop 17% of all pairsSmell alikelowCooked together14,054 recipes
Shared aroma: 1-penten-3-one (fish, pungent).
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Sugar + buttertop 17% of all pairsSmell alikemoderateCooked together98,233 recipes
Shared aroma: guaiacol (smoky, sweet).
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Butter + gingertop 26% of all pairsSmell alikemoderateCooked together7,152 recipes
Shared aroma: trans-2-decenal (waxy, orange).
Sugar and ginger barely smell alike, yet cooks put them together in 14,054 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
- Brown sugar
- Adds sweetness and moisture, and helps the cookies brown.
- Molasses
- Adds moisture, deep flavor, and dark color.
- Butter
- Adds fat that gives the dough richness and a tender texture.
- Baking soda
- Reacts with the acid in the dough to release gas, helping the cookies rise.
- Alum
- Acts as an acid that reacts with baking soda to release gas for lift.
- Ginger
- Provides the main spiced aroma and flavor.
The step that matters
Dissolve the alum in the boiling water first. Alum and baking soda must be fully dissolved so they spread evenly through the dough. Undissolved pockets react unevenly, leaving some cookies with holes or a bitter, metallic taste while others stay flat.
Swap the ginger
How well each one fits the dish's main ingredients (sugar, molasses, butter):
- Cinnamonfits better
- Gingerthe original
- Nutmegfits about as well
- Clovefits about as well
Fit is the average pairing score against sugar, molasses, butter. 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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