Source: The Weather Vane, Mesa, Arizona

Crust
1 tablespoon granulated sugar
3/4 teaspoon baking powder
1/4 teaspoon salt
1/3 cup shortening
1/2 cup buttermilk
1 1/3 cups flour

Mix sugar, baking powder, salt, shortening, buttermilk and 3/4 cup of flour to form a sticky dough. Spread remaining flour on a work surface and knead dough until most of the flour is incorporated and dough is manageable. Roll dough to about 1/4 inch thickness and cut into large pieces. Cover blackberry filling with dough, overlapping pieces, patchwork style.

Filling
1 1/2 pounds Marion blackberries
1 1/3 cups granulated sugar
3 1/2 tablespoons flour
1 1/3 tablespoons vanilla extract

Mix all ingredients and put into prepared pan.

Topping
1/2 tablespoon melted butter
2 1/2 teaspoons granulated sugar

Drizzle melted butter over dough and sprinkle with sugar. Bake until crust is golden-brown and filling is bubbly, about 50 minutes.

Makes 8 to 10 servings.