Begin by preheating your oven to 350 degrees FIn a bowl whisk together1 Cup all purpose flour1/2 tsp baking powder1/2 tsp baking soda1/2 tsp salt1 tsp cornstarch
In a stand mixer or with a hand held mixer cream together1/2 Cup creamy peanut butter1/2 Cup unsalted softened butter
Add to the mixer1/2 Cup brown sugar1/2 Cup granulated sugar1 tsp vanilla1 egg warmed to room temperatureMix until everything is fully combined, then gradually add in the flour mixture
Once a soft dough ball is formed, remove from the mixer, cover in wrap and chill in the fridge for 30 minutes
Line a baking sheet with parchment paper or a silpat mat and place cookie dough balls onto the sheet
Flatten the center of each unbaked cookie with the back of your finger
Add a small amount of marshmallow cream into the well of each cookieYou will need roughly 3/4 Cup marshmallow cream for the entire recipe
Gently pull up the edges of the dough to enclose the marshmallow creamBake for 10-12 minutes or until lightly golden brownAllow them to cool slightly before transferring to a cooling rack