Preheat the oven to 350 degrees F.

Take a bowl and mix butter, graham cracker, and brown sugar. Take around half a cup of this mixture and the other half should be added to a baking pan. Bake it for 10 minutes and now let it cool.

Cook the raspberry Jell-O and add the frozen ones in the boiling water too. Let it chill and then add it to the baked layer.

Now in a bowl add the marshmallows and the milk. Heat it in a saucepan or microwave and mix with the heavy cream. This will be your top whipped layer. You can sprinkle some crumbs of graham cracker as well or maybe some sprinkles. Make sure to let it chill for a minimum of 5 hours.