Preheat oven to 400°. In a large bowl, whisk the first 6 ingredients. In another bowl, whisk yogurt and buttermilk until blended. Add to flour mixture; stir just until moistened. Fold in blueberries.
Fill 12 greased or foil-lined muffin cups two-thirds full. Bake 15-18 minutes or until a toothpick inserted in center comes out clean. Cool 5 minutes before removing from pan to a wire rack.
Editor’s Note: This recipe does not use eggs.
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.