Preheat the oven to 375 degrees. Sift the cornmeal, flour, sugar, baking powder and salt into a medium-sized bowl. Add the buttermilk, egg and melted butter, and stir with a wooden spoon until the dry ingredients are just moistened. (Do not overmix; the muffins will be tough.)
Spoon the batter into the muffin tins that have been lightly greased or filled with paper liners. Fill each about 2/3 full with the batter. Bake until the centers of the muffins feel firm to the touch and a toothpick inserted in the center comes up clean, about 10 to 15 minutes for the mini-muffins and 15 to 20 minutes for the larger muffins. Remove from the oven and cool 5 minutes before turning from the pan.
Nutrition information per serving (1 mini muffin):
Calories90Fat3 gSodium100 mg
Carbohydrates14 gSaturated fat2 gCalcium48 mg
Protein2 gCholesterol16 mgDietary fiber0 g