Preheat oven to 350F. Butter an 8 inch square cake pan. Cream butter, and stir in brown sugar, almond extract and egg yolk. Add flour and rolled oats. Spread batter evenly in pan and bake 25 minutes. In top of double-boiler, melt chocolate chips and pour over cake. Sprinkle with chopped nuts and toasted, chopped almonds. Cool until chocolate hardens. Let it cool before slicing.
Cajun Country -- New Iberia, Louisiana