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Dessert

Boston Lemon Crackers

A lemon-flavored cracker made from flour, butter, sugar, ammonia, lemon essence, and water.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 6 ingredients
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Why it works: Flour and butter are a kitchen classic. They rank in the top 12% of all ingredient pairs, and cooks put them together in 124,287 recipes. Both carry isobutyraldehyde, which smells malty, green. The science ↓

Boston Lemon Crackers

Oven, in the book's wordsA moderately brisk oven

Ingredients

Directions

The book says “a moderately brisk oven”. The 400°F (200°C) in the steps is the modern equivalent, not the book's own figure.

Make the dough

  1. In a large bowl, combine flour, butter, sugar, ammonia, essence of lemon, and water, then mix until a dough forms.

Shape and bake

  1. Shape the dough into small round biscuits, slightly larger than picnic crackers.

  2. Bake in a hot oven at 400°F (200°C) until golden brown.

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.

  1. Flour + buttertop 12% of all pairs
    Smell alikelow
    Cooked together124,287 recipes

    Shared aroma: isobutyraldehyde (malty, green).

  2. Flour + sugartop 15% of all pairs
    Smell alikemoderate
    Cooked together92,116 recipes

    Shared aroma: phenylacetaldehyde (hawthorne, honey).

  3. Butter + lemontop 16% of all pairs
    Smell alikemoderate
    Cooked together41,227 recipes

    Shared aroma: 3-hexenal (apple, fruity).

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

    Shared aroma: isobutyraldehyde (malty, green).

  5. Butter + sugartop 17% of all pairs
    Smell alikemoderate
    Cooked together98,233 recipes

    Shared aroma: guaiacol (smoky, sweet).

Flour and butter barely smell alike, yet cooks put them together in 124,287 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

Flour
Provides the main structure that holds the dough together and sets as it bakes.
Butter
Adds fat, which tenderizes the crackers and gives a rich, crisp texture.
Sugar
Adds sweetness and helps the crackers brown in the oven.
Ammonia
Releases gas as it heats, helping the crackers rise and become light.
Essence of lemon
Adds a bright lemon aroma that carries through the baked crackers.

The step that matters

Baking until golden brown. Sugar darkens quickly in a hot oven, so the crackers can scorch before they are dry. Pulling them once golden brown keeps them crisp and evenly colored.

Swap the lemon

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

  1. Raisinfits better
  2. Vanillafits better
  3. Figfits better
  4. Lemonthe original

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