The Surf Shack is one of the best places for a burger in Tamarindo, the peanut butter and bacon burger is especially awesome. For gluten free options Surf Shack offers two options – the easiest option is to choose lettuce instead of a bun. However, if you bring in your own gluten free buns (available at Auto Mercado) they will prepare an awesome burger for you, complete with toasted bun.
The owner Brian is a really great and personable guy and will answer any questions you may have as well.
If you’re after a killer milkshake there’s a ton of great selections too. You can even get chocolate, peanut butter & bacon if you’re adventurous.