For about 20 biscuits you will need:

2 c. all-purpose flour
1 c. whole wheat flour
4 1/2 tsp. baking powder
2 tbsp. sugar
1/2 tsp. salt
3/4 tsp. cream of tartar
3/4 c. butter
1 egg, beaten

In a bowl combine the flours, baking powder, sugar, salt and cream of tartar. Cut in butter until mixture resembles coarse cornmeal. Add eggs and milk, stirring quickly and briefly. Knead lightly on floured board. Roll or pat gently to 1 inch thickness. Cut into 1 to 2 inch biscuits. Place 3 in a greased 10-inch iron skillet or on a 9-inch square pan. For crusty biscuits, separate on a cookie sheet. Cook at 450 degrees for 12 to 15 minutes.