I read about this cooking class in Lonely Planet, but there's a minimum of 4 people and we are only two. I've read good reviews of it elsewhere.
Here's the description of it from LP:
"Here's a novel idea, whip up a curry while cruising the river at the same time. Classes arranged through Manohra Cruises include a market tour and a cooking lesson aboard a restored rice barge boat. Now that's a mouthful."
If you go under packages and promotions, it's under 'Thai Cooking Class.'
Please let me know if you are interested asap!