There are 2 things I learned when using vanilla caramel candies for making caramel sauce. One: they harden faster. But don’t worry. You can just zap them in the microwave for 20 seconds or so, stir and you’ll have lovely caramel sauce again. Two: they are stickier. But that is not a bad thing at all. In fact it’s a great thing. It worked so well with these bars that I don’t think I will sub my homemade sauce for this particular recipe.  The bars — already crispy and soft to begin with — take on another layer of texture (stickiness!) — for one amazing bite.