Alexander at King Arthur

January 23, 2022 at 4:38pm

Thanks for sharing that memory, Nina! The vinegar called for in this recipe is used as an acid to react with the baking soda in an acid-base reaction to give the muffins a descent rise in the oven. Without the vinegar you may risk having some unreacted baking soda in the batter which make for a low rising and potential bitter/metallic tasting muffin. Happy baking!

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