Fluffy Lemon Cake

Mix together:        box of dry lemon cake mix            
1/2 C apple sauce             
1/2 C buttermilk           
2 eggs

Fold in: 11 oz. can mandarin oranges, undrained

Bake at 350 for 30 min, in a 9 x 13" pan.  

On cooled cake, spread this topping:    

8 oz. crushed pineapple, undrained

8 oz. vanilla yogurt       
3.4 oz box of dry pudding (vanilla or other)     
Mix together.      Fold in 4 oz. whipped topping

I first ate this at a seminary graduation and I've loved it ever since.  It's what I ask for on my birthday.