01 -
In a mixing bowl, stir together rolled oats, milk, pumpkin purée, maple syrup, chia seeds, pumpkin pie spice, cinnamon, vanilla extract, and salt until evenly blended.
02 -
Divide the mixture into two sealed containers or mason jars and chill in the refrigerator overnight or for at least 4 hours to allow oats to soften.
03 -
Melt unsalted butter in a small skillet over medium heat. Add crushed graham crackers and cook, stirring frequently, until golden and fragrant, about 2 to 3 minutes.
04 -
Place mini marshmallows atop the chilled oats and use a kitchen torch to toast until golden brown. Alternatively, broil in the oven for 30 to 60 seconds, watching carefully to prevent burning.
05 -
Sprinkle the graham cracker crumble over the toasted marshmallows and serve immediately for best texture and flavor.