Melt butter and marshmallows in the microwave for 2 minutes.
Mix Rice Krispies & crushed graham crackers in a separate bowl. Using a greased rubber spatula will make working with the mix much easier. Re-grease as necessary.
Pour melted marshmallows over Rice Krispies mix and stir.
Spread mixture into parchment paper-lined (or greased) baking sheet and flatten to roughly the size of the pan.
Spread a layer of fluff onto the mixture.
Sprinkle with chocolate chips.
Place in oven for 2-4 minutes (until chips are melty).
Spread chocolate across the Rice Krispies mixture. Roll into a log and chill.