In a medium bowl, beat butter, confectioners’ sugar, and extracts at medium-high speed with a mixer until creamy, about 3 minutes. Add egg, and beat to combine.
In a separate medium bowl, whisk together flour, salt, and baking powder. Reduce mixer speed to low. Add flour mixture to butter mixture; beat to combine. Add 1 cup sprinkles, and beat until combined.
Roll dough between two pieces of parchment paper. Chill for 30 minutes.
Preheat oven to 350°. Line 2 baking sheets with parchment paper; set aside.
Using a 3-inch round cutter, cut as many cookies as possible, rerolling scraps until all dough is used.
Place cookies on prepared baking sheets. Sprinkle tops with granulated sugar.
Bake until edges are lightly browned, 10 to 12 minutes. Remove from oven, and let cool on pan for 5 minutes. Remove to wire racks to let cool completely.
Spoon approximately 2 tablespoons frosting onto each cookie; sprinkle with remaining ¼ cup sprinkles. Allow frosting to set. Store covered at room temperature for up to 5 days.
Recipe by Southern Lady Magazine at https://southernladymagazine.com/holiday-funfetti-cookies-recipe/