So my sister asked for a birthday cake that had chocolate, caramel and peanuts, so I do what I always do when faced with a challenge, search food.com recipes. Caramel search, ingredients chocolate and peanut butter, type is cake and get six hits. Glad I picked this one!!! OMG, this cake is so rich and complex with all the different flavors and textures going on. I couldn't find peanut butter filled pretzels, but found Keebler chocolate covered peanut butter filled ones, that was a no brainer! I definitely will make this recipe again. Must be served with coffee, milk or ice cream as it's so rich. Thanks for sharing this recipe.