Chocolate Chip Cookie Cake - Crystal Sugar

Ingredients

• 12 tablespoons unsalted butter, softened
• 1 cup packed Crystal Sugar Light Brown Sugar
• 1/2 cup Crystal Sugar Extra Fine Granulated Sugar
• 1 large egg
• 1 egg yolk
• 2 teaspoons pure vanilla extract
• 2 1/8 cup all-purpose flour*
• 2 teaspoons corn starch
• 1/2 teaspoon salt
• 1/2 teaspoon baking soda
• 1 1/4 cups semi-sweet chocolate chips
• 1 cup Vanilla Marshmallow Frosting
• 1/2 cup Chocolate Marshmallow Frosting