I made a variation on strawberry pretzel salad, but I need help with the chocolate I'm adding. I want a chocolate and pretzel bottom, then I put strawberries in strawberry jello on top, then cool whip. I melted chocolate chips and added some sweetened condensed milk so it wouldn't get too hard in the refrigerator, but it was still pretty hard and difficult to cut. Should I use cream instead and make like a ganache? I don't want it to be like chocolate icing mixed with pretzels, I want it harder than that, but still able to cut it. Thoughts?