These gluten-free cinnamon swirl cupcakes taste like a snickerdoodle and a cinnamon roll in one fluffy bite. With a coffee-cake-like swirl of cinnamon sugar insideand a topping of cinnamon cream cheese frosting, these cupcakes will make all your friends swoon.
Preheat the oven to 350°F. Line two muffin tins with 13 cupcake liners.
In a medium bowl, sift together the sorghum flour, sweet rice flour, tapioca starch, millet flour, xanthan gum, cinnamon, baking powder, and salt. Set aside.
In the bowl of a stand mixer fitted with the paddle attachment or a medium bowl with an electric hand mixer, cream together the butter and sugar over medium speed until light and fluffy, about 3 minutes.
With the mixer on low speed, add the eggs one at a time, mixing and scraping down the sides after each one, followed by the vanilla extract.
Add the sour cream, mixing until combined.
Keeping the speed on low, slowly add the dry ingredients in two batches, adding the milk in between, mixing until just combined and scraping down the sides and bottom as needed.
Whisk together the cinnamon swirl ingredients in a small bowl.
Fill the cupcake liners to ⅓ full (35g of batter). I recommend using a trigger ice cream scoop and a measuring scale for even cupcakes. Sprinkle ¾ teaspoon of the cinnamon swirl over top and use a toothpick or chopstick to gently swirl the cinnamon into the batter. Top with 30g more batter, until the cupcake liner is ⅔ full.
Bake for 24-26 minutes until the cupcakes spring back when gently pressed in the middle and a toothpick comes out dry or with a few moist crumbs. These cupcakes will seem light and airy in texture when gently pressed, so take care not to overbake them. Remove from oven. Let cool in the pan for 5 minutes, then transfer the cupcakes to a wire rack to cool completely before frosting.
Cinnamon Cream Cheese Frosting
Sift together the powdered sugar, cinnamon, and salt. Set aside.
In the bowl of a stand mixer fitted with the paddle attachment, cream the butter over medium speed. With the mixer on medium speed, add the cream cheese, one piece at a time, beating until completely smooth.
Slowly add the powdered sugar, in thirds, mixing on low speed until just combined.
Add the vanilla and beat on medium speed until smooth, taking care not to overmix. Pipe or spread onto cooled cupcakes. To get the bakery-style swirls shown here, use a ½-inch to ⅝-inch wide round frosting tip (Ateco 808 or Wilton 1A). Start in the center of the cupcake, swirl out, then back up to a point. Use a spoon to press the frosting down, swirling the spoon before you lift.
Sweet Rice Flour: I don't recommend substituting the sweet rice flour as I find it's essential to chewy cakes, but you may have success replacing it with Bob's Red Mill gluten-free 1-to-1 baking flour.
Alternatively, if you'd rather use an all-purpose gluten-free flour, you can substitute all of the flours and xanthan gum by weight with Bob's Red Mill Gluten-Free 1-to-1 baking flour. The results are slightly denser than when made with the blend written in this recipe, but still very delicious.