Rockefeller Coffee Cake
["1 yellow cake mix", "1 c. brown sugar", "4 Tbsp. flour", "4 Tbsp. butter or oleo (soft)", "4 tsp. cinnamon"]
["Grease and flour 9 x 13-inch pan.", "Mix cake according to directions on box.", "In separate bowl, put remaining ingredients and cut with a pastry cutter or fork.", "Sprinkle over top of cake. Nuts are optional.", "Bake at 350\u00b0 for 35 to 40 minutes."]
["yellow cake", "brown sugar", "flour", "butter", "cinnamon"]