The Gluten-Free Secret to Enjoying Incredible Sourdough Loaves, Breads & Pastries. If you’re gluten-free, then you understand the struggle of finding delicious, gluten-free breads and baked goods. But with Mary Thompson, founder of the beloved A Couple of Celiacs food blog, baking scrumptious glutenfree sourdough is not only possible, it’s easier than you’d think! Master the art of sourdough baking under the guidance of an expert to whip up wheatless loaves, muffins and pies that’ll leave your home smelling like an artisanal bakery. Mary has also included vegan- and allergen-friendly substitutes for her recipes where possible, so everyone can enjoy these gluten-free treats!