Preheat oven to 325F
In a bowl using a hand or stand mixer affixed with the paddle attachment, beat together the butter and sugar for about 2 minutes. You want the mixture to be nice and creamy.
Next up add in the flour and mix together. The mixture will be quite crumbly but don't fret it does come together. I always end up using my hands to clump the dough together at the end.
Now let's form the cookies. Scoop out some cookie dough and roll into balls. Gently roll the balls in the remaining 3 tablespoons of sugar until lightly coated; transfer to the baking sheets 2 inches apart.
Using a measuring cup or flat bottomed glass, press down on the balls to flatten. Sprinkle with some sprinkles (if using) and lightly press down again just so they stick. You want the dough to be about 1/4-1/8 thick.
Bake for 14-16 minutes or until the outside is nice and golden brown.
Remove from oven and allow the cookies to cool in the pan for 15 minutes. This is a crucial step, don't skip. Transfer to a cooling rack for 5-10 minutes and then dig in!
