For the cake:
2 cups all-purpose flour
2 teaspoons baking powder
½ teaspoon salt
2 eggs, separated into yolks and whites
½ cup salted butter, softened
1 cup Splenda® Magic Baker™ Sweetener
1 tablespoon pure vanilla extract
1 cup low-fat buttermilk
1 orange, zested
½ cup fresh or frozen cranberries
⅓ cup stevia-sweetened white chocolate chips, optional
For the cream cheese frosting:
2 cups Splenda® Magic Baker™ Sweetener
2 teaspoons cornstarch
4 ounces cream cheese, softened to room temperature
4 tablespoons unsalted butter, softened to room temperature
1 teaspoon pure vanilla extract