Beat together first 5 ingredients until blended. Mix together the next 6 ingredients and beat in until dry ingredients are just moistened. Do not overbeat. Divide batter between dozen paper-lined muffins cups and sprinkle tops with cinnamon sugar. Bake in a 375 degree oven for about 25 minutes, or until a cake test, inserted in center, comes out clean. Cool in pan for a few minutes, and then continue cooling on a rack. Yields: dozen muffins. SOURCE: Coffee Cakes and Quick Breads by Renny Darling.