Classic Peanut Butter Cookies

Line two baking sheets with parchment paper.

In a medium bowl, whisk together the flour, baking powder, baking soda and salt. Set aside.

In the bowl of an electric mixer, beat the butter, peanut butter, brown sugar and vanilla on medium speed until well combined, about 1 minute. Scrape down the sides of the bowl with a rubber spatula. Add the egg and beat until incorporated, about 20 seconds more. Add the dry ingredients and mix on low speed until just combined, scraping the sides of the bowl as necessary. Mix in the peanut butter chips and chopped peanuts (if using).

Chill the dough for 1 hour (see note below). Set racks in the middle and upper thirds of the oven and preheat to 350°F (175°C). Using a 1½-in scooper with a wire scraper (if you don’t have one, use a spoon and your hands), form the dough into 1½-in (4-cm) balls on the prepared baking sheets. Using the tines of a fork, mark a crisscross pattern on the cookies, pressing them down slightly. Bake for 11 to 13 minutes, rotating the pans from top to bottom and front to back midway through, until puffed and golden on the bottom. Let the cookies cool on the baking sheets for 5 minutes, and then transfer to a rack to cool completely. (Note: the cookies are very fragile when hot, so take care not to break them. They’ll firm up nicely as they cool.)