In a separate bowl, whisk the flour, baking powder, and salt together and set aside.
Beat the butter and 1 ½ cups sugar together in a large bowl using an electric mixer on medium speed until light and fluffy, 3-6 minutes. Beat in the vanilla, then the eggs, one at a time, until combined, about 30 seconds, scraping down the bowl & beaters as needed.
Reduce the mixer speed to low and slowly mix in the flour mixture until combined, about 30 seconds. Give the dough a final stir with a rubber spatula to make sure dough is combined. Refrigerate dough for at least an hour.
Heat oven to 350°F. Using palms, roll 1 tablespoons of dough at a time into balls, then roll in sugar or sprinkles. Place balls on baking sheets, spaced 2 inches apart.
Bake cookies, until the edges are set and just beginning to brown but the centers are still soft and puffy, 10-12 minutes.
The nutrition information provided are only estimates based on an online nutritional calculator. This is not a comprehensive list of all the nutrients in the recipe (i.e., does not include vitamins, cholesterol, etc). I am not a certified nutritionist. Please consult a nutritionist or doctor for accurate information and any dietary restrictions and concerns you may have.