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Dessert

Hot Water Sponge Cake

A sponge cake made with sugar, eggs, baking powder, pastry flour, salt, lemon juice, and boiling water.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 7 ingredients
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Hot Water Sponge Cake

Why it works: Sugar and flour are a kitchen classic. They rank in the top 15% of all ingredient pairs, and cooks put them together in 92,116 recipes. Both carry phenylacetaldehyde, which smells hawthorne, honey. The science ↓

Hot Water Sponge Cake

Oven, in the book's wordsA moderate oven

Ingredients

Directions

The book says “a moderate oven”. The 300°F (150°C) in the steps is the modern equivalent, not the book's own figure.

Prepare

  1. Preheat the oven to 300°F (150°C).

Make the batter

  1. In a bowl, mix the sugar and beaten eggs until well combined.

  2. Sift the baking powder with the pastry flour and add to the egg mixture.

  3. Stir in the salt and lemon juice.

  4. Gradually add the boiling water and mix until smooth.

Bake

  1. Pour the batter into a greased cake pan.

  2. Bake slowly until a toothpick inserted in the center comes out clean.

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.

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.

  1. Sugar + flourtop 15% of all pairs
    Smell alikemoderate
    Cooked together92,116 recipes

    Shared aroma: phenylacetaldehyde (hawthorne, honey).

  2. Egg + flourtop 15% of all pairs
    Smell alikelow
    Cooked together106,462 recipes

    Shared aroma: isobutyraldehyde (malty, green).

  3. Flour + lemontop 17% of all pairs
    Smell alikemoderate
    Cooked together30,404 recipes

    Shared aroma: isobutyraldehyde (malty, green).

  4. Sugar + lemontop 18% of all pairs
    Smell alikelow
    Cooked together53,532 recipes

    Shared aroma: 2-nonenal (fatty, green).

  5. Egg + lemontop 19% of all pairs
    Smell alikelow
    Cooked together44,316 recipes

    Shared aroma: (e,e)-2,4-decadienal (fatty, deep fried).

Egg and flour barely smell alike, yet cooks put them together in 106,462 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

Eggs
Bind the batter and add structure as they set in the oven.
Pastry flour
Provides the structure that holds the cake together as it bakes.
Baking powder
Releases gas in the batter so the cake rises.
Sugar
Sweetens the cake and helps give it a tender crumb.
Boiling water
Adds moisture and helps the batter spread and bake up light.

The step that matters

Gradually add the boiling water and mix until smooth.. Adding the boiling water slowly lets the batter absorb it evenly and stay smooth. Overmixing once the flour is in can toughen the crumb, so mix only until smooth.

Swap the lemon

How well each one fits the dish's main ingredients (sugar, egg, flour):

  1. Raisinfits better
  2. Vanillafits better
  3. Lemonthe original
  4. Figfits about as well

Fit is the average pairing score against sugar, egg, flour. 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.

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