Step 1

Preheat oven to 350 degrees F (175 degrees C). Grease and flour a 9x13 inch pan.

Step 2

In a large bowl, combine cake mix, margarine, 1 egg and 2 teaspoons vanilla. Press into a 9x13 inch pan.

Step 3

Using the same bowl, combine cream cheese, 2 eggs, 2 teaspoons vanilla and 4 cups confectioners' sugar. Mix together until smooth. Pour over cake mixture.

Step 4

Bake in the preheated oven for 35 to 40 minutes. Cake will rise up around sides of pan and look fallen when done. Allow to cool.