Chocolate Revel Bars

1 cup butter or margarine

2 cups packed brown sugar

2 eggs

2 tsp. vanilla

2 1/2 cups flour

1 tsp. baking soda

3 cups quick-cooking rolled oats

1 14-oz. can sweetened condensed milk

1 12-oz. package semisweet chocolate chips

2 tsp. vanilla

Set aside 2 T. of the butter or margarine. In a large mixing bowl beat the remaining butter or margarine with an electric mixer on medium speed for 30 seconds. Add brown sugar; beat until well mixed. Beat in eggs and 2 tsp. vanilla. In another large bowl stir together flour and baking soda; stir in oats. Gradually stir dry mixture into beaten mixture. Set aside.

In a medium saucepan combine the reserved butter or margarine, the sweetened condensed milk, and chocolate. Cook over low heat until chocolate melts, stirring occasionally. Remove from heat. Stir in 2 tsp. vanilla.

Press two-thirds (about 3 1/3 cups) of the oat mixture into the bottom of an ungreased 15x10x1-inch baking pan. Spread chocolate mixture over the oat mixture. Using your fingers, dot remaining oat mixture over the chocolate.

Bake in a 350 degree oven about 25 minutes or until top is lightly browned (chocolate mixture will still look moist). Cool before cutting.