Step 1: Preheat your oven to 350°F (180°C) to ensure even baking.
Step 2: Prepare your chocolate sugar cookie dough and drop tablespoon-sized balls onto lined baking sheets. Bake for 10-12 minutes until edges are set, then cool completely.
Step 3: While cookies cool, cut regular marshmallows in half for the filling.
Step 4: Assemble the sandwiches: place a half marshmallow on one cookie and top with another cookie, pressing down gently.
Step 5: Serve and enjoy! Optionally toast marshmallows lightly for added gooeyness.
