"[Photographs: Elizabeth Barbone] Made with browned butter, these bars taste slightly of caramel. As for the chocolate chips and coconut, they're merely suggestions. Add whatever chocolate, nuts, or dried fruit you enjoy to these bars. The recipe can handle about 3 cups total of "mix-in" ingredients. Or skip the mix-ins altogether—thanks to the browned butter and brown sugar, these bars taste great on their own. About the author: Elizabeth Barbone of GlutenFreeBaking.com joins us every Tuesday with a new gluten-free recipe. She is the author of Easy Gluten-Free Baking. and "How to Cook Gluten-Free"...."