This is an easy recipe to make -- if you already have acorn flour
. If you don't have your own acorn flour, you can substitute chestnuts. If you can't find dried porcini mushrooms, any dried mushrooms will work. Don't skip the garnishes, however. They add a lot. I especially like the slices of grouse breast. I simply sear skinless grouse breast in butter until it's just barely done, then salt and slice thin. One tip: If you do skip all the garnishes, you can actually use this soup as a gravy for meats if you let it get thick. I prefer it thinner, however, with a consistency like melted ice cream.
The soup will hold for several days in the fridge if you want to make it ahead of time.