Name: Vanilla Caramels
Ingredients: 8 lbs white sugar; 2 tins condensed milk; 2 lbs glucose; 2 pints water; 1 lb fresh butter; vanilla flavoring

Why it works: Sugar and vanilla are a kitchen classic. They rank in the top 8% of all ingredient pairs, and cooks put them together in 35,032 recipes. Both carry beta-damascenone, which smells apple, rose. The science ↓

Vanilla Caramels

Ingredients

Directions

The book gives no oven temperature. The 250°F (121°C) in the steps was added when the recipe was transcribed, as a starting point.

Make the caramel

Boil the sugar, glucose, and water until it reaches 250°F (121°C).
Remove the pan from the heat.
Add the condensed milk and butter, cutting them into small pieces.
Stir well with a wooden spatula until thoroughly mixed.
Gently bring the mixture back to a boil.

Set and cut

Pour the mixture onto a greased slab, making a sheet about ½ inch thick.
Cut the set mixture with a caramel cutter.
When cold, separate the squares and wrap them in wax paper.

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.

Sugar + vanillatop 8% of all pairs

Smell alikelow

Cooked together35,032 recipes

Shared aroma: beta-damascenone (apple, rose).
Sugar + condensed milktop 11% of all pairs

Smell alikemoderate

Cooked together804 recipes

Shared aroma: ethanol (alcoholic, ethereal).
Butter + vanillatop 14% of all pairs

Smell alikemoderate

Cooked together20,050 recipes

Shared aroma: guaiacol (smoky, sweet).
Condensed milk + vanillatop 17% of all pairs

Smell alikelow

Cooked together647 recipes

Shared aroma: ethanol (alcoholic, ethereal).
Sugar + buttertop 17% of all pairs

Smell alikemoderate

Cooked together98,233 recipes

Shared aroma: guaiacol (smoky, sweet).

Sugar and vanilla barely smell alike, yet cooks put them together in 35,032 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

White sugar: Provides the bulk of the sweetness and, once cooked, the firm body of the caramel.
Condensed milk: Adds milk solids and sweetness, giving the caramel its soft, chewy texture and colour.
Glucose: Inhibits sugar crystallisation, keeping the caramel smooth and chewy rather than grainy.
Fresh butter: Adds fat that makes the caramel soft, rich, and less likely to set hard.

The step that matters

Boiling to 250°F (121°C). Sugar concentration at this temperature determines the final firmness of the caramel. Too little cooking leaves it soft and sticky; too much makes it hard. Stirring in the milk and butter afterward must be done carefully so the mixture stays smooth.

“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.