Why it works: Lemon and pepper match in chemistry and in kitchens. They rank in the top 3% of all ingredient pairs, and cooks put them together in 27,047 recipes. Both carry trans-2-nonenal, which smells cardboard, fatty. The science ↓
Bechamel Sauce
Ingredients
Directions
Make the sauce
Cook the butter and flour well together with salt and pepper if the stock is not already well seasoned.
Add the stock as in plain white sauce, then the mushrooms, washed, peeled and cut small; let the sauce simmer twenty minutes with the lid half on.
Skim off the butter as it rises.
Strain through a fine sieve pressing hard; add the cream and lemon juice and let boil about three minutes.
Pour out and stir often while cooling.
If this is to be used to mask a chaud-froid it will need one tablespoonful gelatine.
Make the cheese topping and serve
Prepare six slices of toast, removing the crusts.
Cut one pound of soft cheese in small bits and put them in a chafing-dish.
Add one-half glass of ale or butter, one-half saltspoonful red pepper, and stir with a silver spoon until the whole mass is well melted.
Serve the preparation on the toast which should already be on the plates.
Nutrition, whole recipe (rough)
What these numbers assume: 8 portions
| Ingredient | Portion assumed | kcal |
|---|---|---|
| Flour | 1 cup (125g) all-purpose | 455 |
| Cheese | 1 oz (28g) cheddar | 113 |
| Butter | 1 tbsp (14g) | 102 |
| Cream | 1 tbsp (15ml) heavy | 51 |
| Mushroom | 1/2 cup sliced (35g) | 15 |
| Lemon | juice of 1 lemon (48ml) | 12 |
| Chili | 1 tsp (2.7g) | 8 |
| Black Pepper | 1 tsp ground (2.3g) | 6 |
One typical portion per ingredient; the recipe's quantities are not counted. A rough guide only, not for medical or dietary planning.
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. See the original page.
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.
-
Lemon + peppertop 3% of all pairsSmell alikestrongCooked together27,047 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
-
Butter + mushroomtop 7% of all pairsSmell alikemoderateCooked together12,525 recipes
Shared aroma: trans-2-decenal (waxy, orange).
-
Butter + creamtop 8% of all pairsSmell alikemoderateCooked together41,516 recipes
Shared aroma: delta-dodecalactone (sweet, creamy).
-
Butter + cheesetop 8% of all pairsSmell alikemoderateCooked together7,962 recipes
Shared aroma: delta-dodecalactone (sweet, creamy).
-
Cheese + mushroomtop 11% of all pairsSmell alikemoderateCooked together1,015 recipes
Shared aroma: 1-octen-3-one (mushroom, metallic).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Butter
- Enriches the sauce and carries flavour when cooked with the flour.
- Flour
- Thickens the sauce as it cooks with the butter into a roux.
- White stock
- Forms the liquid base that the roux thickens into sauce.
- Cream
- Adds richness and a smoother, silkier texture to the finished sauce.
- Soft cheese
- Melts into the mixture to give a rich, stringy, savoury body.
- Gelatine
- Sets the sauce so it can coat and hold a chaud-froid mask.
The step that matters
Straining and stirring while the sauce cools. Pressing through a fine sieve removes lumps and solids for a smooth sauce, and frequent stirring as it cools prevents a skin from forming and keeps the texture even.
Swap the lemon
How well each one fits the dish's main ingredients (butter, cream, cheese, pepper, flour, mushroom):
- Figfits about as well
- Plumfits about as well
- Avocadofits about as well
- Lemonthe original
Fit is the average pairing score against butter, cream, cheese, pepper, flour, mushroom. 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.
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.

Lemon Sauce236 recipes
Macaroni and Cheese102 recipes
Mushroom Soup60 recipes
Cheese Making50 recipes