Buttermilk Lemon Pie - cooking recipe

Ingredients

1 1/2 c. sugar
6 Tbsp. flour
2 c. buttermilk
4 eggs, separated
1/2 c. lemon juice
1 Tbsp. grated lemon peel
2 Tbsp. butter
1/2 tsp. salt
1/4 tsp. cream of tartar
1/2 c. sugar
1 baked 9-inch pie shell

Preparation

Mix 1 1/2 cups sugar and flour.
Slowly stir in buttermilk. Cook in double boiler until mixture begins to thicken, stirring constantly.
Add beaten egg yolks; cook 2 minutes more.
Blend in lemon juice, peel and butter.
Pour into pie shell.