We also love cooking classes....not only for the experience, the food, but the fabulous people we have met along the way. And, for those who are single (or just traveling alone), we find that about half the class participants are typically single..sometimes more. Great way to enjoy the company of other travelers in a natural setting. Conversation is quick and easy, with the common interest in food, cooking, travels, etc.
I had to stop and think how we have found most of our cooking classes........when traveling independently, definitely Google and then often double-checked on TripAdvisor. Many cooking classes have been options on group tours or small-ship cruises.
Love that you have decided to pursue this focus in your travels.
At home, those with Whole Foods stores, check out their list of classes/tastings, etc. Also a great way to enjoy an evening (or day).