Placing marshmallows wet-side up on cookies will keep the cut-outs smooth when brûléed. When brûléeing, keep the cookies on a wire rack. Avoid holding them to prevent burning yourself.
You can also bake the small cut-outs as mini chocolate cookies. After cutting out the centres, transfer the mini cookies to another parchment-lined baking sheet. Bake until crisp, 5 to 7 min.
Cookies will keep well stored in a covered container up to 3 days.