Pineapple Cake

1/2 cup shortening
1 1/2 cups sugar
2 1/2 cups flour
1 cup drained pineapple
1 tsp. vanilla
2 tsp. baking powder
1/4 tsp. salt
1/4 cup water
3 egg whites

Cream shortening with sugar, add flavoring and pineapple. Sift flour, measure and sift baking powder and salt. Add alternately dry ingredients and water to first mixture and mix thoroughly after each addition. Carefully fold in stiffly beaten egg whites. Pour into greased cake pans. Bake in 375 degree oven for 30 to 35 minutes or until brown.