Coffee Cake
["1 c. sugar", "2 eggs", "1 c. margarine", "2 c. flour", "1 tsp. baking powder", "1 tsp. soda", "1/2 tsp. salt", "1 c. buttermilk (1 c. milk and 1 Tbsp. vinegar)", "1 tsp. vanilla"]
["Mix ingredients; spread 1/2 batter into greased 9 x 13-inch pan.", "Sprinkle 1/2 topping over batter.", "Add remaining batter; sprinkle with rest of topping.", "Bake at 350\u00b0 for 30 minutes, or until done."]
["sugar", "eggs", "margarine", "flour", "baking powder", "soda", "salt", "buttermilk", "vanilla"]