16 tablespoons (224 g) unsalted butter at room temperature1/2 cup (72 g) cornstarch3/4 cup (86 g) confectioners’ sugar1 1/2 cups (210 g) all purpose gluten free flour (i used better batter)3/4 teaspoon xanthan gum (omit if your blend already contains it)1/8 teaspoon kosher saltseedless, smooth