Chocolate Chess Pie

3 oz. unsweetened chocolate
One half cup butter
1 5-oz. can evaporated milk
2 eggs, beaten
1 tsp. vanilla
2 cups sugar
2 Tbsp. flour
1 9-inch pie shell

In a saucepan, melt chocolate, add butter and melt. Add evaporated milk, eggs, vanilla, sugar and flour and cook over medium heat for 5 minutes stirring constantly. Pour into pie shell and bake at 375 degrees for 20 - 25 minutes.