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Boston Baked Beans

A slow‑cooked bean dish with salt pork, sugar, molasses, mustard, and onion.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 8 ingredients
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Why it works: Beans and mustard match in chemistry and in kitchens. They rank in the top 4% of all ingredient pairs, and cooks put them together in 852 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓

Boston Baked Beans

Ingredients

Directions

The book gives no oven temperature. The 300°F (150°C) in the steps was added when the recipe was transcribed, as a starting point.

Prepare the beans

  1. Soak the pea beans for 2 hours.

  2. Parboil the beans for 1 hour, then strain off the water.

Assemble the pot

  1. Place the beans in a covered bean pot.

  2. Add the salt pork to the pot. Add the salt to the pot. Add the sugar to the pot. Add the molasses to the pot. Add the dry mustard to the pot.

  3. Bury the onion in the beans.

  4. Fill the pot with boiling water.

  5. Cover the pot.

Bake and finish

  1. Bake in a slow oven at 300°F (150°C) all day.

  2. Keep the pot covered with boiling water until 1 hour before serving.

  3. Uncover the pot.

  4. Increase the heat.

  5. Bake until dry.

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. Beans + mustardtop 4% of all pairs
    Smell alikestrong
    Cooked together852 recipes

    Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).

  2. Mustard + oniontop 6% of all pairs
    Smell alikestrong
    Cooked together9,259 recipes

    Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).

  3. Beans + oniontop 7% of all pairs
    Smell alikestrong
    Cooked together5,242 recipes

    Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).

  4. Pork + oniontop 10% of all pairs
    Smell alikemoderate
    Cooked together18,214 recipes

    Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).

  5. Beans + porktop 11% of all pairs
    Smell alikemoderate
    Cooked together2,000 recipes

    Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).

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

What each ingredient does

Pea beans
Form the bulk of the dish, softening during soaking and long baking to a tender texture.
Salt pork
Adds fat and savory flavor that seasons the beans slowly during baking.
Molasses
Adds dark color and sweetness, and deepens browning during the long bake.
Sugar
Adds sweetness and helps the surface brown as the beans bake.

The step that matters

Keep the pot covered with boiling water until 1 hour before serving. Beans need steady moisture to cook through and stay tender; if the liquid evaporates or the pot is left uncovered too early, the beans can dry out and toughen before they are fully cooked.

Swap the onion

How well each one fits the dish's main ingredients (beans, pork, sugar, molasses, mustard, egg):

  1. Sweet potatofits better
  2. Lettucefits better
  3. Welsh onionfits better
  4. Onionthe original

Fit is the average pairing score against beans, pork, sugar, molasses, mustard, egg. 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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