Preheat oven to 350
Line a cupcake tin with cupcake liners and set to one side
In a large bowl mix together the cake mix with the cornstarch
Add in milk, vanilla extract, oil, eggs and egg whites and mix on medium speed until well combined
Fill the cupcake liners up ⅔ of the way
Place cupcakes into a preheated oven and bake for 15-20 min or until they are turned a light golden color.
Let the cupcakes cool on a rack.
With an icing tip (I used a Walton M1 attachment) turned upside down so the wide end goes into the cake first, press it in and twist. When you pull it out it will have removed just enough cake for you to fill with strawberry sauce. If you don't have a frosting attachment you can use a spoon to scoop out the cake.
Calories: 299kcal | Carbohydrates: 48g | Protein: 3g | Fat: 11g | Saturated Fat: 4g | Polyunsaturated Fat: 2g | Monounsaturated Fat: 5g | Trans Fat: 0.2g | Cholesterol: 29mg | Sodium: 211mg | Potassium: 59mg | Fiber: 0.3g | Sugar: 33g | Vitamin A: 225IU | Vitamin C: 2mg | Calcium: 73mg | Iron: 1mg