Preheat the oven to 350°F (175°C).

In a medium bowl, combine crushed graham crackers with melted unsalted butter. Press the mixture into a tart pan and bake for about 10 minutes until golden.

In a large mixing bowl, combine softened cream cheese, pumpkin puree, powdered sugar, and pumpkin pie spice. Beat until smooth.

Spread the pumpkin filling evenly over the cooled crust.

Sprinkle chocolate chips over the filling, distributing them evenly.

Spread mini marshmallows over the chocolate layer.

Broil the tart for about 1-3 minutes until the marshmallows are golden brown.

Allow the tart to cool for at least 15 minutes before slicing and serving.