Delicious Cake (Bizcocho delicioso)

A - 1/2 pound butter

B - 1 1/2 cup flour ( sift and measure )
2 teaspoons baking powder
1/4 teaspoon salt

C - 9 eggs
1 teaspoon lemon grind
1 1/2 cup sugar

Butter a bundt pan. Turn oven on to 350 degrees. Melt butter at low heat. Sift three time the ingredients in group B. Separate the egg yolk and the whites. In a bowl beat the egg whites with half the sugar until stiff. In another bowl combine the egg yolks, the lemon rind and beat with the rest of the sugar. Fold in egg whites gently. Fold in the sifted ingredients. Finally add the melted butter. Beat gently until everything mixes together (beat only the necessary to mix ingredients). Pour batter in the butter bundt pan and bake for 45 minutes.