1. Combine Dry Goodness: In a big bowl, whisk together your gluten-free flour, cocoa powder, baking powder, baking soda, and salt until they're all mixed. Set this aside.
2. Cream Wet Ingredients: In another large bowl, using an electric mixer, beat the softened butter, coconut oil, granulated sugar, and brown sugar until the mixture looks light and fluffy.
3. Add Egg & Vanilla: Mix in the egg completely, then stir in the vanilla extract until everything is smooth.
4. Form Dough: Slowly add your dry flour mixture to the wet ingredients, mixing until a soft cookie dough forms. Gently fold in the chocolate chips.
5. Chill & Prep Oven: Pop the dough into the freezer for 30 minutes to firm up. While it chills, preheat your oven to 375°F (190°C) and line a baking sheet with parchment paper.
6. Marshmallow Prep: Grab your large marshmallows and cut each one in half.
7. Stuff the Cookies: Scoop out golf-ball sized portions of dough. Flatten each one, place a marshmallow half in the middle, then carefully wrap the dough around it, rolling it smooth in your palm. It’s okay if a little marshmallow peeks out!
8. Bake Away: Place these stuffed dough balls on your prepared baking sheet, leaving some space between each.
9. Golden Perfection: Bake for 8-10 minutes. The edges should look set, but the centers will still be a bit soft – that's the secret to gooey cookies!
10. Cool & Enjoy: Let the cookies cool on the baking sheet for a few minutes, then move them to a wire rack to cool completely. Get ready for a delicious, healthier-ish treat!