1 c. pinto beans, drained & mashed
1/4 to 1/2 c. milk
6 tbsp. butter
6 oz. unsweetened chocolate
1 tbsp. vanilla
2 lbs. powdered sugar

Melt chocolate and butter. Add mashed pinto beans mixed with milk. Add 1 tablespoon vanilla. Stir until slightly thickened. Gradually work in the powdered sugar. Spread in buttered pan. Refrigerate.

You can add raisins, nuts, etc.