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 ↓
Genuine Rusk
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.
Make the dough
Rub the butter into the flour.
Add the milk and beat it into the flour until it forms a thick batter.
Stir in the well-beaten eggs one by one while the mixture is lukewarm.
Add the salt and then the yeast, beating the batter well.
Let the batter rise for 10 hours.
Turn it out onto a floured board, dredge with flour, and knead until it no longer clings to your hands.
Knead vigorously for 15 to 20 minutes.
Shape and bake
Let it rise again, then roll out to about 1 inch thick and cut into small round biscuit shapes.
Place the biscuits on floured tins and let them rise for 45 minutes before baking.
Bake in a 400°F (200°C) oven for 15 to 20 minutes.
Dry and store
Split the rusks while still warm and place them in a 300°F (150°C) oven or a warm place until perfectly crisp and dry.
Store in a loose bag in a dry place; they will be ready to use in two weeks, but are delicious in three days.
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 + milktop 7% of all pairsSmell alikemoderateCooked together81,283 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
-
Flour + buttertop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Flour + milktop 14% of all pairsSmell alikelowCooked together78,219 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).
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 of the dough and absorbs liquid to build the crumb.
- Eggs
- Add structure and richness, helping the crumb set and bind.
- Yeast
- Produces gas during the long rise, leavening the dough so it becomes light.
- Butter
- Adds fat that tenderises the crumb and gives a rich flavour.
- Milk
- Hydrates the flour and adds moisture and softness to the dough.
The step that matters
Kneading the dough thoroughly. Vigorous kneading develops gluten, giving the dough the elasticity needed to trap gas and rise well. Under-kneaded dough rises poorly and bakes up dense.
“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 rusks recipes
You might also like
White Cake431 recipes
Pound Cake373 recipes
Orange Bundt Cake349 recipes
Spice Cake344 recipesThe 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.