So, you’re in Florence and you need sour cream…what is it called in Italian and where can you find it?
Sour cream = Panna Acida/Panna Agra da Cucina
Check the yogurt section or if there is an ethnic food area in the grocery store.
I have easily found panna agra da cucina in supermarkets like Esselunga, Coop, Panarama and Auchan.