Toby and I are on the America's Test Kitchen panel for testing recipes (you get on it by answering a survey that says "Do you want to be on this panel?"), so over the past few months we've tried out a number of recipes in the testing stage. And hands-down the number one best one was this recipe for gluten-free blueberry muffins. If we hadn't made them ourselves, we wouldn't have believed they were gluten-free. The book they're in is coming out soon, so I can now officially post the recipe, but as that blogger has already done so, I see no point in cutting-and-pasting it here.
So if you or someone you know is GF, we can wholeheartedly recommend that recipe. (And it's a commitment, because GF ingredients are damn expensive! I am literally going to buy the book because we have a giant bag of xanthan gum to use up, and neither of us is GF!)