Buttermilk Biscuits

4 cups flour
2 tbsp baking powder
1 tsp baking soda
3/4 tsp salt
1 tbsp sugar
2/3 cup butter or margarine, softened
1 1/2 cups buttermilk
1/4 cup melted butter

Combine the dry ingredients. Cut in 2/3 cup butter until mixture is like course meal. Add the buttermilk and stir until moistened. Turn dough out onto floured surface and knead 4 or 5 times. Roll out to 1/2 inch and cut with a 2 inch cutter. Brush with melted butter. Bake at 450 degrees F for 8 minutes, or until golden.