Hi Olivia, here's a general rule of thumb that you might find helpful: when replacing milk with buttermilk, replace the baking powder in the recipe with half the amount of baking soda to account for the additional acidity. If this isn't the information you're looking for, consider giving our Baker's Hotline a call at 855-371-BAKE(2253) so we can hear more about your recipe and the changes you're hoping to make. We're here to help! Kye@KAF

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