Step 1

In a large bowl, combine flour, baking powder, sugar (if using) and salt, and toss together.

Step 2

Drop shortening into dry ingredients and use a pastry cutter to cut it in.

Step 3

Continue using your pastry cutter (or two forks) to blend mixture together until it resembles small pebbles. Note: you could combine everything together in the food processor if you want.

Step 4

Transfer mixture to an air-tight container and store, refrigerated, for up to 3 months.