01 -
Preheat the oven to 350°F. Line a baking sheet with parchment paper.
02 -
In a medium bowl, whisk together flour, baking soda, baking powder, salt, cinnamon, and nutmeg until evenly mixed.
03 -
In a large bowl, beat softened butter with granulated and brown sugars until light and fluffy, about 2 to 3 minutes.
04 -
Beat pumpkin puree, vanilla extract, and egg into the butter-sugar mixture until fully incorporated and smooth.
05 -
Gradually add the dry ingredients to the wet mixture, stirring gently until just combined. Avoid overmixing to maintain softness.
06 -
Fold in chocolate chips, mini marshmallows, and graham cracker crumbs evenly throughout the dough.
07 -
Drop tablespoon-sized scoops of dough onto the prepared baking sheet, spacing about 2 inches apart to allow spreading.
08 -
Bake for 10 to 12 minutes until edges are lightly golden and marshmallows appear gooey. Centers may look soft but will set upon cooling.
09 -
Let cookies cool on the baking sheet for 5 minutes before transferring to a wire rack to cool completely, preserving chewy texture.