Whisk together the flour, cornmeal, baking powder, baking soda, salt and sugar. Stir in the eggs, buttermilk and melted butter. Fold in pecans. Spray a 12 cup muffin tin with cooking spray and fill cups about 3/4 full.
Bake in preheated 425 degree oven for 20 minutes or until tops are golden brown. Makes 12 muffins.
Notes
I keep out a few of the pecans to sprinkle on top of the batter before cooking.