Melt the butter in the microwave.
Add the marshmallows, reserving one cup to add at the end.
Stir to coat the marshmallows in melted butter.
Microwave in 30-second increments, stirring each time, until melted.
Add the crushed graham crackers, reserving 1/4 cup for topping.
Add the rice krispies and stir together.
Break two of the Hershey bars into pieces and gently stir into the rice krispie mixture.
Add the remaining marshmallows and stir in.
Break the remaining Hershey bar into pieces and spread over the top.
Sprinkle the remaining crushed graham crackers on top.
Allow to cool for 20 minutes. Slice and Serve.
Cover and store at room temperature.