"These bite-size muffins are popular in our family," reports Suzanne Fredette of Littleton, Massachusetts. "They're especially nice for potlucks since they leave enough room on your plate to try all the other dishes."

buttermilk

To substitute for each cup of buttermilk, use 1 Tbsp. white vinegar or lemon juice plus enough milk to measure 1 cup. Stir, then let stand 5 min. Or, use 1 cup plain yogurt or 1-3/4 teaspoon cream of tartar plus 1 cup milk.

Blueberries

If using frozen blueberries, use without thawing to avoid discoloring the batter.