Good Chocolate Pie - cooking recipe

Ingredients

1 c. sugar
1/4 c. flour
3 Tbsp. cocoa
1/4 tsp. salt
1 c. milk
1 c. evaporated milk
3 egg yolks, slightly beaten
1/2 stick butter
1 tsp. vanilla
1 baked pie shell
3 egg whites
pinch of salt
1/4 tsp. cream of tartar

Preparation

Mix first 4 ingredients well.
Add both milks.
Cool, slowly stirring often and well until thickens.
Add slightly beaten egg yolks.
Cook about 1 minute.
Add butter and vanilla.
Cook about 2 to 3 minutes more, until smooth and thick.
Cool well.
Add to baked pie shell.