This is a great recipe. Some other reviewers had problems with the center falling-these tips may help. Cakes will sink or fall because of the following 1.Overbeating-too much air is incorporated 2.Underbaking- oven temp is too low or too short a baking time 3.Over or under measurement of ingredients 4.Using too small/large of baking pan 5. Make sure your oven temp is correct-preheat for at least 30 min. and check to make sure your oven is heating properly by using an oven thermometer for accuracy and finally, only open your oven door if you have to and then make sure 3/4 of the cooking time is up. Happy baking everyone!