Preheat the oven to 350.
Combine the graham crackers, butter, and sugar in a deep dish pie plate and press into the sides. Note: I crushed my graham crackers in a food processor and then added the butter and the sugar.
In a large bowl whisk together the 1/2 cup melted/cooled butter, the four eggs, the 1 1/2 cups granulated sugar, the 3 T flour, and the 1/2 cup chocolate spread until smooth.
Pour the filling into the graham cracker crust.
Bake for 40 minutes
Take the pie out of the oven, move a rack to the top of the oven, and turn the heat up to 400 degrees. Cover the top of the pie with marshmallows. Put back in the oven for 5 to 10 minutes, watching the whole time. Take out the pie when the marshmallows are golden on top.
Let cool completely before cutting. When going to cut, it works best to spray a knife with cooking spray first, then cut, then clean it and respray for the next cut.