Walter_oesau said I should have some sachertorte and "kaffe mit schnippe" (which my dictionary translates as "penis coffee". Anyway, I tried the first suggestion. It's chocolate cake with chocolate icing. However, it isn't overly sweet or rich. It's more subtle than that, and you don't feel like you have overdosed on sweets after having a piece. There are spices in it, too (at least the piece I had) - ginger, and others I could not identify.
I also bought some local cheese at a grocery store, "raschesbrie". It was basically brie, but firmer, with a milder taste.
Other than that, I've been chugging litres of fruit juice. It's quite inexpensive here, compared to back home.