Preheat the oven to 350°F.
Whisk the flour, baking soda, and salt in a medium mixing bowl.
In a large mixing bowl, beat the peanut butter, butter, oil, sugars, milk, and vanilla and mix again.
Slowly add the flour mixture into the wet mixture, mixing until just combined.
Finally, fold in the chocolate chips, graham crackers and marshmallows.
Place rounded scoops of dough on a baking sheet. Top each with a piece of graham cracker and a marshmallow if desired.
Bake for 9 -11 minutes, until golden brown.