Preheat the oven to 250 degrees F. Place a large grill pan over medium-high heat.
Divide the pizza dough into 4 even pieces. Roll out each piece into an oval and brush with the vegetable oil. In batches of 1 or 2, grill the crusts until nice grill marks form, 2 to 3 minutes. Flip and continue cooking on the reverse side until cooked and toasted. As you go, remove the cooked crusts to a baking sheet and keep warm in the oven.
Spoon 2 tablespoons of the fudge sauce onto each crust and spread evenly almost to the edge. Dollop each crust with 2 tablespoons of the marshmallow creme and spread slightly. Sprinkle with the mini marshmallows, chocolate chips and crushed graham crackers. Cut into pieces and serve.