Confetti Birthday Cake | Low Sugar Recipe

Ingredients

• 1¼ cup lowfat buttermilk, at room temperature, divided use
• ½ cup vegetable oil
• 5 large egg whites, at room temperature
• 2 teaspoons vanilla extract
• 2 ½ cups cake flour
• 1 cup Splenda® Granulated Sweetener
• 1 tablespoon baking powder
• ½ teaspoon baking soda
• ½ teaspoon salt
• ¾ cup (1½ sticks) unsalted butter, softened at room temperature
• 3 tablespoons sugar-free rainbow sprinkles