Chocolate Peanut Butter Bars

1/2 cup butter

1/2 cup packed brown sugar

1 teaspoon vanilla extract

2 cups peanut butter

2 1/2 cups confectioners' sugar

2 cups semisweet chocolate chips

Directions

1. Melt butter or margarine over low heat. Add sugars, peanut butter and vanilla. Mix well.
2. Press into a 9 x 13 inch pan.
3. Melt chocolate chips and spread over the top. Cool