Gluten-Free Bisquick Mix

Makes about 6 cups.

2 1/2 cups rice flour (white, brown, or a mixture of both)
1 2/3 cups potato starch
3 teaspoons baking powder
2 1/2 teaspoons salt
2 tablespoons sugar
1/2 cup dry buttermilk (powder)
3 tablespoons egg substitute
3/4 cup shortening, plus
3 tablespoons shortening

In a large bowl, whisk together all dry ingredients. Cut in the shortening until no lumps appear.

Store in the refrigerator or the freezer.