I got this recipe from a friend (Laura R.) and I am not sure where she got it. It is wonderful to make with children. You must use frozen strawberries to make the Jello set.
Put pretzels in a large plastic bag and crush with a rolling pin to make 2 cups. Kids love to do this part!
Mix 2 cups crushed pretzels, 3/4 cup melted butter and 4 Tab sugar. Spread in a 9x13 inch baking dish and bake in a 400 degree F oven for 8 minutes. Do not over bake. Let cool.
Bring 1-8 oz. package of cream cheese to room temperature. When soft, add 1 cup sugar to it and fold in 1-8 oz. package of Cool Whip. Spread over cooled pretzel layer.
Dissolve 1 large package Strawberry Jello in 2 cups hot water. Stir in 2-10 oz. pkgs. of frozen strawberries. After it starts to jell, pour on top of cream cheese layer and refrigerate until firm. Serve as a dessert or side dish.