Preheat and prep. Get your oven to 375°F and line your baking sheets with parchment paper. This is the responsible adult part of the recipe.
Cream the good stuff. In your mixer, beat together the peanut butter, butter, granulated sugar, and brown sugar until everything's blended and fluffy. This takes about 2-3 minutes. Don't rush it—this is where the cookie texture magic happens.
Add the wet ingredients. Beat in the egg, milk, and vanilla until fully combined. The mixture should look smooth and cohesive.
Mix the dry ingredients. In a separate bowl, whisk together the flour, baking powder, and salt. This ensures even distribution so you don't get pockets of baking powder in your cookies.
Combine and chill. Add the flour mixture to the peanut butter mixture and mix until just combined. Don't overmix—once you can't see dry flour anymore, you're done.
Scoop and space. Scoop tablespoon-sized portions of dough (use a 1.5 tablespoon cookie scoop if you have one) and roll them into balls. Place them 2 inches apart on your prepared baking sheets. They'll spread a bit, so give them room.
Bake with confidence. For medium cookies (1.5 tablespoon scoop), bake for 8 minutes. For larger cookies (3 tablespoon scoop), bake for 10 minutes. Set a timer and trust the process. They should look barely done when you pull them out—soft in the middle, just starting to set around the edges.
The crucial candy press. The instant those cookies come out of the oven, gently press a candy into the center of each cookie. The residual heat will melt the chocolate slightly and create that perfect seal. Don't wait—do this immediately.
Exercise restraint. Let the cookies cool on the pan for 5 minutes, then transfer to a cooling rack. Allow the chocolate to fully set before eating, or don't. I'm not your boss.
