01 -
Start by chopping up your graham crackers and Hershey's bar into chunks. Cut those mini marshmallows in half - this step is key to preventing them from getting too wild in the oven!
02 -
Whisk together your flour, salt, baking powder, baking soda, and cornstarch in a bowl. Set this aside for now.
03 -
Beat your room temperature butter with both sugars until it's nice and creamy (about 2 minutes). Mix in the egg and vanilla until well combined, scraping down the bowl as needed.
04 -
Gradually mix the flour mixture into your butter mixture on low speed. Then gently stir in most of the marshmallows (save a handful for later), chocolate chips, and graham crackers. Don't overmix!
05 -
Pop your dough in the fridge for at least an hour. When ready, heat oven to 350°F and roll dough into 2-tablespoon sized balls, placing them about 2 inches apart on lined baking sheets.
06 -
Bake for 8 minutes, then top with those reserved marshmallows and Hershey's pieces. Back in the oven for 2-3 more minutes until done. If any marshmallows try to escape, just nudge them back in place with a cookie cutter while they're still hot!