Princeton Cake

Directions

1. 1
   Preheat oven to 350°.
2. 2
   Butter and lightly flour 2 round cake pans.
3. 3
   Cream butter and slowly add sugar, beating until light.
4. 4
   Add egg yolks, mandarin juice and mandarin rind and beat well.
5. 5
   Mix flour, cornstarch, salt and baking powder.
6. 6
   Stir dry mixture into butter mixture, blend until smooth.
7. 7
   Beat egg whites in a separate bowl until stiff, not dry.
8. 8
   Gently stir 1/3 of the egg whites into the first mixture, then fold in remaining whites.
9. 9
   Spread batter in the pans and bake for 30 to 40 minutes, or until a straw comes out clean.
10. 10
    Cool in pans for 5 minutes before turning out onto racks. Frost with Buttercream Icing.