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 says “a moderate oven”. The 350°F (175°C) in the steps is the modern equivalent, not the book's own figure.
Prepare the beans
Soak the beans in cold water overnight.
Drain and rinse the beans, then simmer in fresh cold water until soft enough to pierce with a pin.
Drain the beans in a colander and run cold water through them.
Assemble the pot
Place the beans in a bean pot and pour boiling water over the salt pork.
Scrape the rind of the pork until white, cut it into strips, and bury it in the beans, leaving only the rind exposed.
Mix the salt, dry mustard, and molasses with enough hot water to fill a cup, then pour over the beans.
Add enough water to cover the beans and keep them covered until the last hour of baking.
Bake
In the last hour, lift the pork to the top to let it crisp.
Bake for 8 hours at 350°F (175°C).
Optionally, place the heart of an onion on top of the beans for 2 to 3 hours.
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.
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Beans + mustardtop 4% of all pairsSmell alikestrongCooked together852 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Mustard + oniontop 6% of all pairsSmell alikestrongCooked together9,259 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Beans + oniontop 7% of all pairsSmell alikestrongCooked together5,242 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Pork + oniontop 10% of all pairsSmell alikemoderateCooked together18,214 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Beans + porktop 11% of all pairsSmell alikemoderateCooked 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
- Dried beans
- Form the bulk of the dish and become tender during soaking, simmering and long baking.
- Salt pork
- Adds fat and savory flavor that moves into the beans as they bake.
- Molasses
- Adds sweetness and dark color to the sauce as it thickens during baking.
- Dry mustard
- Adds a sharp, pungent flavor that balances the sweetness of the molasses.
The step that matters
Keeping the beans covered until the last hour. Covering the beans keeps them moist during the long bake, so they cook through and do not dry out or scorch. Uncovering only at the end lets the pork rind crisp and the top brown.
Swap the onion
The recipe marks onion as optional. How well each one fits the dish's main ingredients (beans, pork, mustard, molasses):
- Lettucefits better
- Welsh onionfits better
- Broccolifits better
- Onionthe original
Fit is the average pairing score against beans, pork, mustard, molasses. 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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