In a bowl combine flour, baking soda + baking powder, cocoa powder, salt, and corn starch and mix together.
In another bowl combine sugars and softened butter until fluffy. Add in the egg and vanilla extract.
Add the flour mix to this sugar mixture slowly.
Using a cookie scoop get some of the cookiesdough and flatten it in your palm. Place a marshmallow in the middle and fold it over. Make sure a little marshmallow is sticking out. Coat with graham crackers.
Cook at 350 for 12 minutes. Depending on your stove temperature cook for another 5 minutes if it's not ready.
Cool for a few minutes and enjoy.
