Preheat your oven to 350 degrees. Prepare a mini muffin tin with nonstick cooking spray. Sift together flour, baking powder, and salt then set aside.
Spoon cupcake batter into your prepared mini muffin tin about 3/4 the way full. Bake for 10-12 minutes or until cupcakes are cooked through and a toothpick can come out clean. Place on a rack to cool completely before icing.
With an electric mixer cream together confectioners sugar and softened butter. Once well combined add in vanilla extract and heavy whipping cream then mix in again. Add to a piping bag and top on cooled cupcakes. Top with sprinkles.