Why it works: Flour and butter are a kitchen classic. They rank in the top 12% of all ingredient pairs, and 124,287 recipes mention both. Both carry isobutyraldehyde, which smells malty, green. The science ↓
Egg Sauce for Boiled Rock
Ingredients
Directions
Make the sauce
Cream the flour with the butter in a saucepan.
Stir in the boiling water and continue stirring until the butter melts.
Add the chopped hard boiled eggs and bring to a boil.
Serve
Serve immediately.
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 aroma chemistry they share, and how many recipes mention both.
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Flour + buttertop 12% of all pairsAroma overlaplowMentioned together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Flour + eggtop 15% of all pairsAroma overlaplowMentioned together106,462 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Butter + eggtop 17% of all pairsAroma overlapmoderateMentioned together118,967 recipes
Shared aroma: decanal (soap, orange peel).
Flour and butter share little aroma chemistry, yet 124,287 recipes mention both: they likely 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
- Thickens the butter and water into a smooth, cohesive sauce.
- Butter
- Adds richness and fat, giving the sauce a smooth, silky mouthfeel.
- Hard boiled eggs
- Add body and savoury flavour to the sauce as they are heated through.
The step that matters
Stirring the butter and flour into the boiling water. Constant stirring keeps the flour dispersed so it hydrates evenly and does not clump, which is what gives the sauce a smooth texture instead of lumps.
“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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