Theses Gooey Chocolate Peanut Butter Cup Cookies are one of my family's very favorite cookie recipes. The insides of these cookies stay soft and slightly under baked so every bite produces a gooey mouthful of chocolate and peanut butter cups.
In a small bowl, whisk together the flour, baking powder, and salt, and set aside.
Combine the chopped chocolate, the peanut butter, and the butter in a microwave-safe bowl, and microwave in 30-second increments until completely melted and smooth. Stir after every 30 seconds to prevent overheating. Let the mixture cool to lukewarm.
Place the sugar and eggs in the bowl of a large stand mixer, and beat with a whisk attachment until thick and foamy, about 5 minutes. Add the chocolate mixture and the vanilla, and mix them in until they’re incorporated. Scrape down the bottom and sides of the bowl, as the chocolate has a tendency to sink to the bottom.
Stir in the flour mixture, and when that’s incorporated, add the miniature peanut butter cups, reserving about 1/4 cup of them. Press a layer of cling wrap on top of the batter and refrigerate it until it’s firm enough to scoop, at least 1 hour. (The batter can be refrigerated for several days, but it will need to sit at room temperature to become workable if it has been chilled for an extended period.)
Preheat the oven to 350 degrees F and line baking sheets with parchment paper. Use a large 1/4-cup scoop to scoop large portions onto the baking sheets. Cut the remaining peanut butter cups in half, and press a few of them on top of each cookie. Bake the cookies until they look dry and crackly on the top, but the center is still very jiggly and soft when pressed, about 12-15 minutes. Cool the cookies on the baking sheet—if you try to move them too soon, they’ll fall apart. Once cool, store the cookies in an airtight container at room temperature for 3-4 days. For the best taste and texture, microwave them for a few seconds before serving, so the centers get warm and gooey.
You can find miniature peanut butter cups at Trader Joe’s. You can also look for Reese’s miniature peanut butter cups at grocery stores, drug stores, or online at Amazon . Alternately, you can chop up large peanut butter cups and stir those pieces in instead.
Our recipes are developed using weight measurements, and we highly recommend using a kitchen scale for baking whenever possible. However, if you prefer to use cups, volume measurements are provided as well. PLEASE NOTE: the adage “8 oz = 1 cup” is NOT true when speaking about weight, so don’t be concerned if the measurements don’t fit this formula.