Why it works: Flour and lemon are a kitchen classic. They rank in the top 17% of all ingredient pairs, and cooks put them together in 30,404 recipes. Both carry isobutyraldehyde, which smells malty, green. The science ↓
Treacle Pudding
Ingredients
Directions
Prepare the pastry
Mix the flour, suet, baking powder, and a pinch of salt together.
Form into a stiff paste with cold water.
Divide the paste into two equal portions; line a basin with one portion.
Roll out the second portion thinly to form a lid.
Layer and steam
Add a layer of treacle to the basin, sprinkle with breadcrumbs and lemon rind.
Cut a round from the rolled‑out paste to cover the treacle, moisten edges with water, and seal it to the lining.
Add another layer of treacle, breadcrumbs, and lemon rind, and cover with pastry as before.
Repeat until the basin is full, then cover with greased paper.
Steam for about 2.5 to 3 hours.
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 + lemontop 17% of all pairsSmell alikemoderateCooked together30,404 recipes
Shared aroma: isobutyraldehyde (malty, green).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Flour
- Forms the paste that structures the pudding and encloses the filling.
- Suet
- Adds fat that keeps the pastry tender and rich as it steams.
- Treacle
- Provides sweetness and a dark, sticky syrup that soaks into the sponge layers.
- Breadcrumbs
- Absorb the melting treacle, adding body and texture to each layer.
- Baking powder
- Releases gas during steaming, helping the pastry rise and lighten.
The step that matters
Sealing the pastry around the treacle. If the edges are not moistened and sealed to the lining, steam and syrup can escape or leak, leaving the pudding dry or unevenly cooked. A tight seal keeps the moisture inside during the long steam.
“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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