Gather the following:
Ingredients:
1/2 cup butter, softened
1 cup granulated sugar
1 egg
1 egg white
1 Tbsp sour cream
1 tsp vanilla extract
2 1/2 cups all-purpose flour
1/2 tsp baking powder
1/2 tsp salt
1 recipe vanilla frosting, recipe follows
Then CLICK HERE for the Instructions
Do It And How 
Looks pretty delicious and easy to make. Thank you for sharing this recipe.