Chocolate Cake With Black Walnut Cream Filling
["1 box chocolate cake mix", "2/3 c. sugar", "2/3 c. milk", "2 egg yolks, beaten", "1 Tbsp. flour", "1 c. black walnut meats", "1/2 tsp. vanilla", "1 Tbsp. butter", "1 container chocolate frosting"]
["Place sugar, milk, egg yolks, flour and butter in double boiler.", "Cook until custard forms.", "After custard cools, add nuts and vanilla.", "Spread between layers.", "Cover with chocolate frosting."]
["chocolate cake mix", "sugar", "milk", "egg yolks", "flour", "black walnut meats", "vanilla", "butter", "chocolate frosting"]