RECIPE BOOKLET - King Arthur Baking

1 teaspoon baking powder • 3/4 teaspoon salt • 1/2 teaspoon baking soda • 1/2 teaspoon ground cinnamon (optional) • 1 cup blueberries, fresh or frozen Wet Ingredients • 1 teaspoon vanilla extract • 1/3 cup vegetable oil • 1 1/2 cups buttermilk or plain (not Greek) yogurt Topping • Cinnamon-sugar or coarse white sparkling sugar ... ................
................