Why it works: Butter and flour 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 ↓
Hash on Toast
Ingredients
Directions
Make the hash
Melt the butter in a skillet over medium heat.
Add the chopped beefsteak and water, cooking until heated through.
Stir in the flour to thicken the mixture.
Serve
Moisten the toast with hot water and sprinkle with salt.
Pour the hash over the toast arranged on a platter.
Garnish with sliced hard-boiled eggs.
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.
-
Butter + flourtop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Flour + eggtop 15% of all pairsSmell alikelowCooked together106,462 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Butter + eggtop 17% of all pairsSmell alikemoderateCooked together118,967 recipes
Shared aroma: decanal (soap, orange peel).
Butter and flour 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
- Cold beefsteak
- Forms the main body of the hash, providing protein and savoury flavour.
- Butter
- Adds fat and richness, helping the hash brown and taste rich.
- Flour
- Thickens the cooking liquid so the hash holds together rather than running off the toast.
The step that matters
Stirring in the flour. Flour needs to be cooked and mixed evenly into the hot liquid, otherwise it can clump and leave floury pockets. Stirring while it heats lets the starch swell smoothly and thicken the hash evenly.
“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.
More hash on toast recipes
You might also like
The free Flavor Lab newsletter: one surprising pairing a week and the molecular reason it works, in 60 seconds. No spam, unsubscribe anytime.
Prefer an account? Create a free account to save pairings and unlock the full chemistry.
Tomato Soup526 recipes
Brown Bread461 recipes
Mutton Broth292 recipes
Yorkshire Pudding264 recipes