Ingredients

  • 1 1/2 cups Silvanas Kitchen Gluten-Free All-Purpose Flour
  • 1 teaspoon baking powder
  • 1/2 teaspoon baking soda
  • 1/2 teaspoon kosher salt
  • 1/2 cup natural cocoa powder (not Dutch process)
  • 1/2 cup semisweet chocolate chips
  • 3/4 cup boiling water
  • 1 cup sugar
  • 3/4 cup sour cream, at room temperature
  • 1/2 cup canola oil
  • 2 large eggs, at room temperature
  • 1 tablespoon pure vanilla extract
  • 4 large egg whites, at room temperature
  • 1 cup sugar
  • Pinch of cream of tartar
  • 3/4 teaspoon pure vanilla extract (optional)

Method

  • Make the cupcakes Preheat the oven to 350 and line a 12-cup muffin pan with paper liners.
  • In a bowl, whisk the flour, baking powder, baking soda and salt.
  • In a large bowl, whisk the cocoa powder and chocolate chips with the boiling water until smooth.
  • Add the sugar, sour cream, canola oil, eggs and vanilla; whisk until no streaks remain.
  • Whisk in the dry ingredients until incorporated.
  • Make the cupcakes Fill the prepared muffin cups with the batter and bake for about 20 minutes, until a toothpick inserted in the center of the cupcakes comes out clean.
  • Transfer the cupcakes to a rack and let cool completely.
  • Meanwhile, make the frosting In a heatproof bowl set over a saucepan of simmering water (the bottom of the bowl shouldn't touch the water), whisk the egg whites with the sugar and cream of tartar until the sugar has dissolved, about 3 minutes.
  • Remove from the heat.
  • Using a handheld electric mixer, beat the whites at high speed until stiff peaks form, about 6 minutes.
  • Beat in the vanilla.
  • Meanwhile, make the frosting Transfer the meringue frosting to a piping bag fitted with a large round pastry tip and frost the cupcakes.