Preheat the oven to 180°C (350°F).
Crush the pretzels into coarse crumbs. Transfer to a bowl and add the sugar and melted butter, then mix well to combine.
2½ cups pretzels,, 3 Tbsp sugar, ½ cup butter,
Press the pretzel mixture into the bottom of a 9x13-inch baking dish and make sure it is firmly packed. Bake for 10 minutes, then remove from the oven and let it cool completely.
In a large bowl, using a mixer, beat the cream cheese and sugar until smooth. In a separate bowl, whip the whipped topping until fluffy.
8 oz cream cheese, ½ cup sugar, 8 oz whipping cream
Gently fold the whipped topping into the cream cheese mixture using a silicone spatula until well combined.
Spread the mixture evenly over the cooled pretzel crust. Chill in the refrigerator for 30 minutes.
While the middle layer is cooling in the refrigerator, bring the water to a boil. Stir the strawberry jello into the boiling water until fully dissolved. Add the thinly sliced strawberries to the gelatin mixture.
6 oz strawberry jello, 2 cups boiling water, 2 cups fresh strawberries,
Once the gelatin has cooled slightly, carefully pour it over the cream cheese layer.
Return to the refrigerator and let it chill for an additional 2-3 hours, or until the top layer is fully set.
Once the jello layer has set, cut the Strawberry Jello Pretzel Salad into squares and serve.