Family Tested & Approved
margarine or butter, softened
unsweetened chocolate, melted
Beat together all ingredients except chocolate.
Divide batter in half and add chocolate to one half.
Spoon both batters into a prepared 13x9 pan and swirl.
Bake at 350 degrees for 30 - 40 minutes or until set.
Note -- A substitute for 1 oz. unsweetened chocolate is 3 tablespoons of cocoa plus 1 tablespoon of oil or butter/margarine.