01 -
Beat together the peanut butter, softened butter, light brown sugar, and granulated sugar in a big bowl until the mixture is fluffy and light (around 3-4 minutes). Toss in the egg and vanilla and mix until it’s smooth. In another bowl, stir the flour, baking soda, and salt together. Slowly add these to the wet stuff, mixing just until blended. Set it aside.
02 -
In a second large bowl, whisk melted butter with sugar until it’s combined. Mix in the egg and vanilla thoroughly. Then, sift the flour, cocoa, baking powder, and salt, and gently stir these into the wet blend until you’ve got smooth dough.
03 -
Turn on the oven and set it to 350°F (175°C). Cover a baking tray with parchment. Grab one tablespoon each of the peanut butter and brownie doughs, then push them together into one ball. Twist lightly so the swirls keep their shape—don’t mix too much!
04 -
Arrange the dough balls on the lined tray, keeping about two inches of space between each one. Let them bake for 10-12 minutes, stopping when the edges are firm but the middle still feels soft.
05 -
Leave the cookies to sit on the tray for five minutes, then move them to a cooling rack to finish completely.