Grandpa'S Perfect Pound Cake - cooking recipe

Ingredients

1 lb. very soft butter
3 c. sugar
10 egg yolks
10 egg whites
5 1/2 c. sifted flour
6 tsp. baking powder
3/4 c. milk
2 tsp. vanilla
1 tsp. grated lemon rind

Preparation

Beat butter with sugar for 5 minutes at low speed.
Add egg yolks; beat 2 minutes at low speed.
Beat egg whites 2 minutes at high speed with same beater, then beat creamed mixture 5 minutes longer at low speed.
Sift 5 1/2 cups flour and baking powder together.
Beat 1/3 of flour into bowl at low speed.
Beat in milk until smooth.
Beat in 1/3 of flour until blended.
Add egg whites; beat until smooth.
Reserve 1/4 cup flour.
Add remaining flour to bowl; increase speed to medium and beat for 5 minutes more.
Add vanilla and grated lemon rind.
Beat at medium speed for 2 minutes.