hiya will!!!! Roasting peppers give the peppers such a unique flavor.. don't really know how else to answer that... lol. Yes, after the peppers have cooled and you have removed the charred skin.. just puree in the blender/processor, then add melted butter and some tobasco (Frank's Hot Sauce, or whatever hot sauce you like).... mix until well blended. I don't have an exact recipe.. I just go by taste more than anything else. I have also added minced garlic before, for something different.
I just cook for myself, so I rarely follow an exact recipe. Most recipes are geared for a family or more than one person. I like to experiment.