Step 1

Begin by preheating your oven to 350 degrees F. Spray mini muffin pans with baking spray and set aside.

Step 2

In a bowl, add the butter and beat with a mixer for about 1 minute. Then add the powder sugar, baking powder, and salt. Beat until creamy (2-3 minutes), scraping the sides of the bowl as necessary.

Step 3

Next, beat in the egg and vanilla. Then beat in the flour until just combined.

Step 4

Divide the dough into two portions. Stir green sprinkles into one half and mix red sprinkles into the other half.

Step 5

Shape the dough into 1-inch balls. Then, press the balls into the prepared mini muffin pan. Press each dough ball with your thumb.

Step 6

Bake for 8-10 minutes or until the edges are light brown. Remove from the oven and press the centers with the rounded side of a measuring teaspoon. Cool in pan for 5 minutes. Then remove to finish cooling on a wire rack.

Step 7

In the meantime, prepare the frosting by beating together the softened butter, powdered sugar, vanilla, and salt. Add as much milk as needed to create a smooth frosting.

Step 8

Use a piping bag with a large star tip to frost the cooled cookies. Top with additional sprinkles. Pack and store in an air-tight container.