Peanut Butter and Chocolate Truffles

Peanut Butter and Chocolate Truffles
1 C peanut butter chips
3/4 C butter
1/2 cup cocoa
1 can (14 oz)sweetened condensed milk
1 tablespoon vanilla

Coatings: crushed graham cracker crumbs, confectioners sugar or
crushed nuts
Makes about 3 dozen truffles
In a heavy saucepan, over low heat, melt chips with butter. Stir in
cocoa until smooth. Add condensed milk and vanilla. Cook and stir until
thickened and well blended, about 4 minutes. Remove from heat. Chill
until firm enough to handle. Shape into 1 inch balls. Roll in desired
coating. Chill until firm. Store, covered in refrigerator.