Three adults visiting Tuscany in September. Would like to stay in a farmhouse or b&b where the hosts offer evening cooking lessons. We are not interested in cooking school or culinary classes - just how to cook one or two evening meals.
you haven’t specified where exactly you're planning to be based: Florence area? Siena? Chianti area?
The are plenty of farmhouses where hosts offer cooking lessons. I can recommend to do a search on TuscanyAccommodation.com, our website regarding accommodation in Tuscany and to define your search by area/type of property.
Rather than starting from who offers cooking lessons directly, I'd suggest to first decide whether there is a particular area you want to be based in.... then, for example, Ginny and Fiamma offer cooking lessons wherever you might be!
If you have no preference of location and are looking at ideas, then you can look into staying at either Casolare di Libbiano, a B&B near San Gimignano that offers cooking classes for guests or at Villa Dianella, another B&B but this one near Vinci that offers classes to its guests.