First, we make the crust:
Preheat the oven to 350 F. Crush the hard pretzels with a rolling pin and mix with ¾ cup melted butter, and 3 1/2 tbsp granulated sugar.
Press this mixture into the bottom of a 9x13-inch baking dish, and bake for 10 mins. Let cool completely.
Make the cream cheese filling:
Using a hand-held mixer, beat together the cream cheese and sugar in a large bowl until creamy and smooth.
Using a spatula, fold in the cool whip and refrigerate it for 15 mins.
Make the strawberry salad:
Combine the jello with boiling water until dissolved. Cool down completely.
Assemble the cake:
Spread the cream cheese filling over the pretzel base and refrigerate for one hour.
Spoon the sliced strawberries on top of the cooled cream cheese filling.
Pour the cooled strawberry jello on top and refrigerate overnight.