Grease 13 x 9 pan. Bake at 350 degrees for 18 minutes. Oatmeal layer: Mix in large bowl 1 cup melted butter, 2 cups brown sugar, and 2 eggs, 1 teaspoon vanilla, 1 1/2 cups flour, 1 teaspoon baking soda, 4 cups quick oats, 1 cup chopped walnuts. Mix and reserve 1 cup of entire mixture for top of cookies.

FUDGE LAYER:

1 can sweetened condensed milk
12 oz. chocolate chips
2 tbsp. butter
1 tsp. vanilla

Melt above on stove. Pour over oatmeal mixture. Drop globs of reserved mixture on top of chocolate and bake at 350 degrees for 18 minutes.