According to blogger Icy Violet's Kitchen there isn't! She tried out this Joy the Baker recipe for dulce de leche cupcakes and this is what she came up with:
From Icy Violet's post:
The original recipe here called for dulce de leche in place of caramel, and you are ever so surely welcome to use that instead. I had a jar of delicious quality caramel just languishing in the refrigerator that I decided to use, but feel free to go with either. Or be daring and do butterscotch!
And because the original post had so many links back to bloggers who've also tried the same dulce de leche cupcake recipe, here's a few more:
chocolate dulce de leche cupcakes by Heart of the Home
dulce de leche cupcakes by Channeling Contessa