http://www.kitchenlink.comI like this recipe since Bisquick is make with buttermilk. There is another recipe or two for the mix in the chat archive..
QUICK MIX8 1/2 cups all purpose flour
4 tablespoon baking powder
1 tablespoon salt
2 teaspoons cream of tartar
1 teaspoon baking soda
1 1/2 cups instant non fat milk or dry buttermilk powder
2 1/4 cups vegetable shortening
In a large bowl, sift together all dry ingredients. Blend well. With a pastry blender, cut in shortening until evenly distributed. Mixture will resemble cornmeal in texture. Put in large airtight container. Labe. Store in a cool,dry place. Use within 10 to 12 weeks. Makes about 13 cups of Quick Mix
Variation: Use 4 1/4 cups all purpose flour and 4 1/4 cups whole wheat flour instead of 8 1/2 cups flour. Increase baking powder to 2 tablespoons
High altitude above 3500 feet, increase flour about 1/2 cup for better results.