Sweet Potato Surprise Cake - cooking recipe

Ingredients

1 1/2 c. cooking oil
2 c. sugar
4 eggs, separated
4 Tbsp. hot water
2 1/2 c. sifted cake flour
1 tsp. ground cinnamon
1 tsp. ground nutmeg
1 1/2 c. grated raw sweet potato
1 c. chopped nuts
1 tsp. vanilla flavoring
2 c. flour
2 tsp. baking powder
1/2 tsp. salt
2/3 c. butter
1 c. sugar
3 egg yolks, beaten
1/3 c. orange juice
1 tsp. grated orange rind
2 egg whites, stiffly beaten

Preparation

Cream the butter.
Add sugar; cream until light and fluffy. Add egg yolks one at a time.
Beat well.
Add sifted dry ingredients alternately with orange juice; beat well.
Add rind. Fold in egg whites.
Put into two 9-inch cake pans and bake at 375\u00b0 for 25 to 30 minutes.