Preheat oven to 350 degrees. Line a baking sheet with parchment paper or silicone baking mat. Set aside.
In a small bowl, combine flour, baking powder and baking soda. Stir dry ingredients to just mix together. Set aside.
In a large mixing bowl cream butter and sugar together using a mixer on medium speed. Mix for 2 to 3 minutes so the butter is light and fluffy. Add egg and vanilla. Continue mixing until combined. Turn the mixer speed to low and slowly add in dry ingredients. Continue mixing on low speed until dry ingredients are fully incorporated and cookie dough is formed.
Pour sprinkles into a small bowl for rolling. Scoop teaspoon sized dough balls and roll each one in between your palms to form a ball. Roll individual dough balls sprinkles until completely covered. Place dough balls on cookie sheet about 2 inches apart. Using the bottom of a drinking glass, lightly press each cookie to slightly flatten it. Do not completely flatten, cookies should still be thick. Use gentle pressure.
Bake for 10 minutes to 12.
Remove cookies from oven and all to cool for about 15 minutes so the cookies have time to firm up slightly.