Preparation / Directions:
Preheat oven to 325¡.
Lightly grease a 9" x 13" pan.
In a large bowl, cream the 1 cup butter and the brown sugar together with an electric mixer. Add the eggs; beat until light. Blend in the vanilla. In another bowl, stir together the flour and baking soda. Beat into the butter mixture. Stir in the rolled oats. Spread 3/4 of the flour/oat mixture into the prepared pan evenly.
In a small heavy saucepan, combine the chocolate chips, sweetened condensed milk and the remaining 2 tablespoons butter. Stir over low heat until the chocolate is melted. Pour the chocolate mixture evenlyh over the oat mixture in the pan. Dot with the remaining oat mixture.
Bake for 20-25 minutes, or until the edges are browned and the center feels firm.
Cool in the pan on a wire rack. When cool, cut into bars.