Ingredients:2 sticks butter, unsalted (1/2 lb., softened)1 cup vegetable oil1 cup sugar, granulated1 cup confectioner’s sugar (sifted)2 eggs (large)1 teaspoon vanilla extract4 cups flour, all-purpose (500 gr.)1 teaspoon baking soda1 teaspoon cream of tartar1 teaspoon …
