Preheat oven to 400(degrees) F. Combine flour and baking powder and set aside. Place milk, eggs, sugar, peanut butter and salt in blender container; cover and blend. Pour over dry ingredients; stir just to moisten. Fill greased muffin pans 2/3 full. Bake in a 400 F. oven 15 to 20 minutes. Makes 12.