Prepare Dry Ingredients by whisking together the flour, baking powder, and salt until well combined.

Mix Wet Ingredients by beating the softened butter and granulated sugar until light and fluffy. Add in the egg and vanilla extract, mixing until combined.

Combine Mixtures by gradually adding the dry ingredients to the wet mixture, mixing gently until just combined.

Add Sprinkles by folding in the colorful sprinkles evenly throughout the dough.

Chill Dough by portioning out the dough into large tablespoons and chilling in the refrigerator for at least 2 hours.

Bake by preheating your oven to 350°F and baking the cookies for 12–13 minutes until edges are lightly browned.

Cool by letting the cookies cool on the baking sheets for about 5 minutes before transferring to a wire rack.