Preheat the oven to 350°F. Line the wells of two 12 count cupcake pans with liners.
In a medium bowl use a whisk to sift together cake mix, cake flour, granulated sugar and salt. Sift together the dry ingredients.
In a separate bowl, mix together the sour cream, water and oil until combined.
Using a hand mixer gradually beat the wet ingredients into the dry ingredients.
After all of the wet ingredients are added continue mixing for around 2 minutes or until fully combined. (The batter will taste sweet at this point, but it will mellow as the cupcakes bake.)
Fill each muffin cup about 2/3 full. (Depending on how you separate the batter, you may be able to yield more than 24 cupcakes.)
Bake for 20 minutes until the tops are golden and a toothpick inserted into the center comes back clean. Cool completely on a wire rack.
Use a sharp knife to remove a small opening from the centers, and fill with fresh whipped cream, lime or lemon curd.
Garnish with fresh berries and a sprig of mint. Alternatively, serve glazed with a lemon or orange glaze.
Notes
Why Add Flour and Sugar to Cake Mix? Cake mixes are continuing to dwindle in size. Using additional flour and granulated sugar in this instance adds volume and updates the flavor profile. Remember, this is a cake mix hack and meant to be a doctored version of a box cake mix. You could use all purpose flour in place of cake flour.
Flavorings - You could use almond extract, lemon extract or any flavorings that you enjoy to change the flavor profile.
Hollow Out the Centers and Fill - After cooling them completely, use a knife to hollow out a small opening in the center and fill half of the angel cakes.
Fillings - Fill these cupcakes with whipped cream, lemon curd, pudding, ice cream or pastry cream in any flavor.
Garnish - You can garnish each cupcake to suit your taste. Try adding any type of fresh berries such as blueberries, strawberries, raspberries or blackberries and a sprig of mint for color. They turn out pretty and delicious! These cakes can be served with ice cream and a drizzle of chocolate fudge sauce, too.
Transform into Strawberry Shortcakes - These little angel food cupcakes can also form the base for strawberry shortcake or they can be served without a filling and frosted just like any cupcake with your fav
Angel Food Cake Recipe Options - You could bake this batter in an angel food cake pan for one whole cake.