Preheat the oven to 375 degrees. Grease parchment paper and line pans.
Cream butter and sugar really well together.
Add eggs and vanilla. Mix and scrape the sides of the bowl as needed.
Add the flour, baking powder, baking soda and salt separately and combine well after each addition.
Roll cookie dough into bouncy ball sized balls. Roll in sugar and sprinkles and place on cookie sheets.
Bake for 9-11 minutes.