Name: Nut-butter Toast
Ingredients: 4 slices zwieback; ½ cup peanut butter; ½ cup hot water; ¼ teaspoon coarse sea salt

Why it works: Peanut and butter are a kitchen classic. They rank in the top 16% of all ingredient pairs, and cooks put them together in 1,754 recipes. Both carry trans-2-decenal, which smells waxy, orange. The science ↓

Nut-butter Toast

Ingredients

4 slices zwieback
½ cup peanut butter
½ cup hot water
¼ teaspoon coarse sea salt

Directions

The book gives no oven temperature. The 350°F (175°C) in the steps was added when the recipe was transcribed, as a starting point.

Prepare

Preheat the oven to 350°F (175°C).
Toast the zwieback until nicely browned.

Make and serve

In a bowl, mix the peanut butter with hot water and salt until smooth.
Spread the peanut butter mixture on the hot toast.
Serve immediately.

Recipe from a historical cookbook (Internet Archive).

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.

Peanut + buttertop 16% of all pairs

Smell alikemoderate

Cooked together1,754 recipes

Shared aroma: trans-2-decenal (waxy, orange).

Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs

What each ingredient does

Zwieback: Forms the crisp, dry base that holds the spread once toasted.
Peanut butter: Provides the main flavor and a rich, fatty spread for the toast.
Hot water: Thins the peanut butter so it spreads smoothly over the toast.

“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.