Basic Cake Mix

Sift flour, sugar, and baking powder together. Cut in butter and
shortening with a pastry blender or two knives. You can also use your
food processor for this step.

Store mix in a covered container in the refrigerator and use within
the month.

Note: Store mix in the refrigerator rather than on the pantry shelf
because it contains butter. It will still be as convenient as a
packaged mix, however, as the recipe for Quick Pound Cake shows.