I have tested this recipe many times in many ways, and it is really faboulous bread. Make sure you don't overmix the dough, and only let it rise once when its in the pan. Xanathan gum is expensive but it lasts a very long time. I have subbed many different gf flours in this recipe, and they all turned out "fine" but this one is "fabulous".
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Read the preparation instructions at Food.com