Place all ingredients in food processor and process until dough resembles sand. With the food processor still on, drizzle in about 1 or 2 tablespoons of water, until dough comes together in a clump.
Wrap dough in plastic wrap and chill for at least two hours. Remove from refrigerator and let come to room temperature.
Preheat oven to 350 degrees.
Roll out dough to 1/4 inch thickness on a baking sheet that has been lined with a silicone mat or parchment paper. Cut out tombstone shapes that are about 2 inches wide and 3 inches tall. Remove excess dough between tombstone shapes.