Preheat oven to 350°F. Spray ... vanilla or lemon extract may be added for extra ... be used for muffins. Bake muffins for about ... center comes out clean.
Ingredients: 15 (blueberries .. egg .. flour .. juice .. peel .. salt ...)
Cream butter; gradually add 1/3 ... Stir in vanilla extract and fold in blueberries. Spoon into greased muffin pans, fill 2/3 full. Combine ... on top of muffins. Bake in preheated oven ... 25 to 30 minutes.