Preheat an oven to 400 degrees. Get out a 9x13 baking dish.
Crush up the pretzles until you have 2 cups worth of crushed pretzels. Combine them in a bowl with the melted butter and sugar. Then add to the baking dish.
Bake for 8 minutes. Remove and let the crust cool completely.
Next make the Jell-O by dumping the powder into the bottom of a bowl, then adding in 1 cup of boiling water to dissolve the powder and then 1 cup of cold water.
If your Jell-O has too much foam on top you can skim it off using a slotted spoon.
Mix your berries into the Jell-O.
While the Jell-O is setting up (don't let it fully set up, it should be the texture of jelly) you are going to make the middle layer of heavy cream and cream cheese.
Meanwhile, prepare the cream layer. In a stand mixer or large bowl, whip the heavy cream with the sugar until soft peaks form (the peak should droop slightly when you lift the whisk).
Add the softened cream cheese, 1 tablespoon at a time, mixing well between each addition. Continue mixing until stiff peaks form (the peak should stand straight up when the whisk is lifted).
Now it's time to assemble - place the heavy cream/cream cheese on top of the pretzel crust, making sure to cover it completely.
Then add the Jell-O on top, spread to make an even layer.
Refrigerate uncovered until the Jell-O has completely set up before serving. I would give it a couple hours to chill.
Use a knife to cut out slices.
Store leftovers in the fridge. Now you can cover it with plastic wrap.