Recipe Almond Lemon Cake

Ingredients
8 egg whites
1 dash cream of tartar
1 cup white sugar
1 cup butter, softened
1 1/2 tablespoons grated lemon zest
1 tablespoon lemon juice
1 cup sour cream
2 teaspoons vanilla extract
2 cups all-purpose flour
1 teaspoon baking powder
1/8 teaspoon salt
1 cup finely chopped blanched almonds

Directions
In a bowl, beat the egg whites with the cream of tartar until stiff. Gradually beat in 1/2 cup sugar.
In another bowl, stir together the flour, baking powder, and salt.
In a large bowl, cream the butter or margarine with the remaining 1/2 cup sugar. Beat in lemon rind, lemon juice, sour cream, and vanilla. Stir the flour mixture into the butter mixture, along with about 1/3 of the beaten egg whites. Fold in the rest of the egg whites gently but thoroughly. Stir in the almonds. Turn the batter into a greased and floured tube pan.
Bake at 350 degrees F (175 degrees C) for about 70 minutes, or until it tests done with a toothpick. Cool on a wire rack.