1 1/2 cups zwieback crumbs
3/4 cup granulated sugar
1/2 tsp. cinnamon
1/3 cup melted butter or margarine
Combine crumbs, sugar and cinnamon.
With a fork, stir in butter.
Reserve 1/4 cup of mixture for topping.
Press remaining crumbs into a 9" pie plate.
Do not bake.