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We bought dried kidney beans for a canned-bean slow-cooker recipe. How do we change the plan without an argument?

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My partner tipped the shopping onto the counter and said, "These were cheaper." He'd bought dried red kidney beans for a recipe specifying two cans, drained. We were going to put the ingredients into the slow cooker before going out.

I hadn't started cooking. Looking up the substitution led me to the [Food Standards Agency's advice on raw kidney beans](https://www.gov.uk/government/publications/home-food-fact-checker/home-food-fact-checker): raw or undercooked red kidney beans can contain a harmful lectin, and they should not be cooked raw in a slow cooker. Canned beans have already been processed with soaking and boiling.

We'll get the canned beans for this recipe rather than improvise a dried-bean conversion today. My partner thinks that defeats the point of planning a cheap, convenient meal, and says I treat every small change like an exam. How would you explain why this substitution changes the preparation, without turning a missed line on the shopping list into a judgment on his cooking?

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2 community replies

This isn't simply swapping one brand for another. The [FSA guidance](https://www.gov.uk/government/publications/home-food-fact-checker/home-food-fact-checker) distinguishes processed canned beans from raw red kidney beans and warns against slow-cooking the latter raw. Buying the canned ingredient lets you keep the recipe you actually planned. No trial run of the unsafe substitution is needed to settle the disagreement.

He bought them to save money, which was a useful intention. Acknowledge that while saying the saving doesn't make today's preparation interchangeable. 'Let's use these another day with appropriate preparation guidance' may be easier to hear than 'you bought the wrong thing again.'

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