I don’t put coffee in my potato soup. However, I do cook the bacon and onions in some butter. The recipe calls for it. I use a variation of this recipe. I don’t put in pepper, and I use chicken broth rather than vegetable broth. I don’t bother with buttermilk, I just use regular milk…and I shred a carrot into the soup, to give a bit of color and flavor. This involves three of the four smells, and I’ve been assured that it is a very yummy soup indeed.
Bread (raisin cinnamon bread best for the purpose)
During my brief stint in high end timeshare sales (hate me now) we baked chocolate chip cookies and mini cinnamon rolls (from commercial pre-made dough) in the model unit to entice people to feel “at home” there.