Why it works: Rhubarb and raisin work together. They rank in the top 9% of all ingredient pairs, and cooks put them together in 47 recipes. Both carry isobutyraldehyde, which smells malty, green. The science ↓
Rhubarb Pie
Ingredients
Directions
The book gives no oven temperature. The 400°F (200°C) in the steps was added when the recipe was transcribed, as a starting point.
Prepare
Preheat the oven to 400°F (200°C).
Line a pie dish with pastry.
Brush the pastry with egg white.
Fill and bake
Fill the dish with raw rhubarb and scatter sultana raisins among the fruit.
Sweeten generously.
Cover with a top crust and bake.
Brush with egg white while hot and close the oven door to glaze the crust.
Serve
Serve cold.
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.
Photo for illustrative purposes only · Contact us to use it
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.
-
Rhubarb + raisintop 9% of all pairsSmell alikemoderateCooked together47 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Raisin + sugartop 13% of all pairsSmell alikemoderateCooked together12,481 recipes
Shared aroma: beta-damascenone (apple, rose).
-
Rhubarb + sugartop 18% of all pairsSmell alikemoderateCooked together1,852 recipes
Shared aroma: 1-penten-3-one (fish, pungent).
-
Egg + sugartop 21% of all pairsSmell alikemoderateCooked together122,807 recipes
Shared aroma: 2-nonenal (fatty, green).
-
Egg + raisintop 23% of all pairsSmell alikemoderateCooked together9,556 recipes
Shared aroma: decanal (soap, orange peel).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Rhubarb
- Provides the tart fruit filling that forms the body of the pie.
- Egg white
- Brushed on the crust to promote browning and a glossy finish.
- Sugar
- Sweetens the tart rhubarb and helps balance its acidity.
- Sultana raisins
- Add chewy sweetness and small pockets of concentrated fruit flavor.
The step that matters
Brushing the crust with egg white while hot. Egg white proteins set and turn golden as the crust bakes, so brushing it on while the pie is hot helps it glaze evenly and gives a glossy, browned surface.
Swap the rhubarb
How well each one fits the dish's main ingredients (egg, raisin, sugar):
- Cinnamonfits better
- Nutmegfits better
- Rhubarbthe original
- Gingerfits about as well
Fit is the average pairing score against egg, raisin, sugar. 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.
More rhubarb pie 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.

Rhubarb Marmalade35 recipes
Rhubarb Jelly28 recipes
White Cake431 recipes
Pound Cake373 recipes