Basic Chocolate Cake | Sweet'N Low

Ingredients

• 6 tablespoons reduced-calorie stick margarine
• 2 large egg whites, at room temperature
• 1/2 cup buttermilk
• 1 teaspoon grated orange peel
• 2 teaspoons vanilla extract
• 1/4 cup liquid egg substitute
• 12 packets or 4 teaspoons bulk Sweet 'N Low® zero calorie sweetener, divided
• 1/4 cup plus 2 tablespoons granulated sugar
• 1/4 teaspoon salt
• 1 teaspoon baking soda
• 2 teaspoons baking powder
• 1 cup plus 2 tablespoons all-purpose flour
• 1/2 teaspoon chocolate extract
• 1/4 cup unsweetened cocoa powder
• 1/4 teaspoon cream of tartar