– 1/2 cup unsalted butter, (1 stick) softened to room temperature– 1-1/2 cups granulated white sugar– 2 large eggs– 1 teaspoon cream of tartar– 1 teaspoon baking soda
Stream in the sugar and beat until creamed. Beat in eggs, cream of tartar, baking soda, vanilla extract, and salt until combined. Beat in flour until combined.