Why it works: Flour and butter are a kitchen classic. They rank in the top 12% of all ingredient pairs, and cooks put them together in 124,287 recipes. Both carry isobutyraldehyde, which smells malty, green. The science ↓
French Rolls
Ingredients
Directions
The book says “a hot oven”. The 400°F (200°C) in the steps is the modern equivalent, not the book's own figure.
Make the sponge
Peel and boil the potatoes in 2 quarts of water until tender.
Press and drain the potatoes through a colander and let cool.
Add flour to the potatoes to make a thick batter and beat well.
When lukewarm, add ½ cup potato yeast to the batter.
Make this sponge early in the morning and let it rise until light.
Make the dough
Transfer to a bread pan and mix in 1 teaspoon salt and ½ cup lard.
Add enough flour to form a soft dough and mix well.
Set the dough in a warm place to rise, knead down, and let rise again, repeating this process 5-6 times.
Shape and bake
Cut the dough into small pieces and shape into rolls about 1 inch thick and 5 inches long.
Roll the shaped rolls in melted butter or sweet lard.
Place in well-greased baking pans, pressing them closely together.
Let the rolls rise for a short time before baking.
Bake in a hot oven at 400°F (200°C) for 20 minutes, covering with paper if they brown too quickly.
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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Flour + buttertop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Potato + buttertop 13% of all pairsSmell alikemoderateCooked together6,456 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
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Potato + flourtop 15% of all pairsSmell alikemoderateCooked together5,355 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
- Potatoes
- Provide starch and moisture that give the rolls a soft, tender crumb.
- Flour
- Forms the batter and dough structure that traps gas and sets the crumb.
- Potato yeast
- Leavening agent that ferments the sponge so the dough rises.
- Lard or butter
- Adds fat that tenderizes the crumb and gives a rich flavor and softness.
The step that matters
Letting the sponge and dough rise until light. Yeast needs time and warmth to ferment and build gas bubbles; under-proofed dough gives dense rolls, while the repeated rises develop structure and flavor.
Swap the potato
How well each one fits the dish's main ingredients (flour, butter):
- Shallotfits better
- Leekfits better
- Arrowrootfits better
- Potatothe original
Fit is the average pairing score against flour, 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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