Preheat oven to 375ºF.

In a medium mixing bowl, combine flour, baking soda, and baking powder. Set aside.

In a large mixing bowl, beat butter and sugar together until smooth.

Add egg and vanilla and beat again.

Add flour mixture and beat until dough forms. Dough will be crumbly at first but will eventually come together.

Using a 1-inch cookie dough scoop, scoop dough and roll into round balls. Place on a greased baking sheet.

Using the smooth bottom of a glass, press each ball of dough down until they are about 1/2inch thick.

Place sprinkles in a small bowl. Take flattened cookie dough and push each into the sprinkles. Place dough back on the baking sheet, sprinkle side up.

Bake 8 to 10 minutes.

Allow to cool for 3 minutes before transferring to a cooling rack.