A little soft butter for the
pan
1 cup cornmeal
1 cup unbleached white flour
2 teaspoons baking powder
1/2 teaspoon baking soda
1/2 teaspoon salt
1 large egg
1/4 cup sugar
3 tablespoons melted butter
1 cup buttermilk (in a 2-cup liquid measuring cup)
1 1/2 cups blueberries