Peanut Butter Brittle

1 C corn syrup

1 C peanut butter

1 C sugar

8 C corn flakes

1 t vanilla

Boil corn syrup and sugar for 1 minute. Remove from heat and add peanut butter. Stir until melted. Add vanilla and pour over corn flakes and stir until coated. Put on buttered pan or waxed paper.