2 1/2 c. plus 2 tbsp. butter, softened
1 1/2 c. firmly packed brown sugar
1 c. granulated sugar
2 eggs
4 tsp. vanilla
2 1/2 c. flour
1/2 c. cocoa
2 tsp. baking soda
1 tsp. salt, optional
6 c. oats
1 (12 oz.) pkg. chocolate chips
1 can sweetened condensed milk

Heat oven to 375 degrees. In mixer bowl beat 2 1/2 cups butter and sugars until fluffy. Beat in eggs and 3 teaspoons vanilla then combined flour, cocoa, baking soda and salt. Stir in oats. Drop by tablespoonfuls on ungreased baking sheets. Bake 10 minutes or until set. Cool. In saucepan combine chips, sweetened condensed milk, remaining 2 tablespoons butter and 1 teaspoon vanilla. Over medium heat, cook and stir until chips melt. Immediately sandwich cookies together with chocolate mixture.

GOLDEN SANDWICH COOKIES:

Omit cocoa. Increase flour to 3 cups. Proceed as above.