01 -
Heat your oven to 350°F (175°C). Prepare a baking tray by covering it with parchment paper. Keep it ready to use.
02 -
Using a stand or hand mixer, whip together the peanut butter, softened butter, white sugar, and brown sugar for about 2 minutes until it's smooth and fluffy.
03 -
Crack the egg into the bowl, add in the vanilla extract, and mix again until it all comes together completely.
04 -
Grab another bowl and whisk together the flour, salt, and baking powder until combined.
05 -
Slowly add the dry mix into the wet ingredients while stirring. Keep mixing until the dough becomes soft and comes together.
06 -
Drop tablespoon-sized portions of the dough onto your prepped baking sheet. Leave about 2 inches of space between each. Gently press each top with a fork to make a crisscross pattern.
07 -
Pop them into the oven for 10–12 minutes until the edges are a light golden color, and the tops look set. Let them cool on the tray for 5 minutes before moving them to a wire rack to cool completely.
08 -
When the cookies are completely cool, spread about 1 tablespoon of marshmallow fluff onto the flat side of one cookie.
09 -
Pour 1 teaspoon of your warmed peanut butter over the marshmallow layer.
10 -
In a microwave-safe bowl, heat the chocolate chips in 20-second bursts, mixing between each until melted. Spread or drizzle this over the peanut butter.
11 -
Take another cookie and gently press it onto the layered filling to complete the sandwich.
12 -
Leave the sandwiches alone for 10–15 minutes to firm up. If you want the chocolate to harden faster, stick them in the fridge for 10 minutes.