Into a large bowl or a bowl of a stand mixer, mix together the butter and peanut butter. About 2 minutes so the butters can really get to know each other. From there, add in the vanilla and the brown and white sugar. Mix on high for about 2 minutes. You want the sugars to really dissolve into the butters.
Crack in 1 egg at a time and mix. All the egg to get fully incorporated before adding in the next egg. Mix until the batter is pale and creamy.
Add in the flour, baking soda, baking powder, and salt. Mix on low just until the flour is fully incorporated. Do not over mix!
Using an ice cream scoop, scoop out the dough onto a baking sheet. Each cookie should be about 2 tbs of dough. Leave 2 inches between cookies. Once you have scooped out all of the dough, grab a fork and create the famous cross pattern on top of the cookie. Simply press down on top of the cookie in one direction, then do it again in the opposite direction. Place tray into the freezer for 30 minutes. This is a key step so don't skip!
Preheat oven to 350F
Place cold cookie balls onto a baking tray and be sure to leave some space between the cookies as they will spread. Bake for around 16-20 minutes or until the outsides of the cookies begin to turn a deeper brown. Remove from oven and let sit on the cookie sheet for 5 minutes. After fire minutes place on a cooling rack to cool for an additional 10 minutes. That's it! Enjoy with a glass of milk!
