Follow these simple steps to create your Mini Individual Pumpkin S’mores Pie Cups:

1. Preheat the Oven: Start by preheating your oven to 350°F (175°C).
2. Prepare the Crust: In a medium bowl, combine graham cracker crumbs, melted butter, and sugar. Mix until the crumbs are evenly coated.
3. Form the Cups: Press the graham cracker mixture into the bottoms and up the sides of a muffin tin to form small cups. Bake for 8-10 minutes, or until golden brown. Remove from the oven and let cool slightly.
4. Make the Filling: In a large mixing bowl, whisk together the pumpkin puree, sweetened condensed milk, egg, vanilla extract, pumpkin pie spice, and salt until smooth.
5. Fill the Cups: Pour the pumpkin filling into each graham cracker cup, filling them about three-quarters full.
6. Bake the Filling: Return the muffin tin to the oven and bake for an additional 15-20 minutes, or until the filling is set.
7. Add Toppings: Remove from the oven and immediately sprinkle mini marshmallows and chocolate chips on top of each pie cup.
8. Final Bake: Return to the oven for another 2-3 minutes, or until the marshmallows are golden and slightly toasted.
9. Cool: Allow the pie cups to cool in the muffin tin for about 15 minutes before carefully removing them.
10. Serve: Transfer the pie cups to a serving platter and let them cool completely before enjoying.