Name: White Fondant
Ingredients: 2¼ lbs sugar; 1¼ cups hot water; ¼ teaspoon cream of tartar

Why it works: Sugar and cream are a kitchen classic. They rank in the top 9% of all ingredient pairs, and cooks put them together in 43,450 recipes. Both carry 2,3-butanedione, which smells butter, sweet. The science ↓

White Fondant

Ingredients

2¼ lbs sugar
1¼ cups hot water
¼ teaspoon cream of tartar

Directions

Make the syrup

Combine sugar, hot water, and cream of tartar in a smooth granite saucepan.
Stir the mixture and heat gradually to boiling point.
Boil without stirring until a soft ball forms in cold water at 238°F (114°C).
Wipe the sides of the kettle with a hand dipped in cold water to remove sugar adhering to the sides.

Work and store

Pour the mixture slowly onto a slightly oiled marble slab.
Let it cool for a few minutes, then scrape it to one end of the marble.
Work the fondant with a wooden spatula until it becomes white and creamy.
Knead with your hands until perfectly smooth.
Place in a bowl and cover with oiled paper to exclude air.

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 + creamtop 9% of all pairs

Smell alikemoderate

Cooked together43,450 recipes

Shared aroma: 2,3-butanedione (butter, sweet).

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

What each ingredient does

Sugar: Forms the sweet, bulk structure of the fondant once cooled and worked into fine crystals.
Cream of tartar: Acid that helps prevent large sugar crystals from forming, keeping the fondant smooth.
Hot water: Dissolves the sugar so it can be boiled into a syrup evenly.

The step that matters

Boil without stirring until a soft ball forms at 238°F (114°C). Stirring during boiling can trigger premature sugar crystallization, making the fondant grainy. Reaching the correct temperature sets the water content so the candy turns soft and creamy when worked.

“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.