This recipe has been modified from Bette Hagemans Butter Basted White Bread (More From the Gluten-Free Gourmet, page 38). Here it is:
Combine 2 cups white rice flour, ½ cup potato starch flour, ½ cup tapioca flour, 2 ½ teaspoon xanthan gum, 2/3 cup dairy milk powder, 1 ½ teaspoon salt, 2 tablespoons plus 1 teaspoon sugar and 2 ¼ teaspoon saf-instant yeast granules thoroughly. In a separate bowl, combine 4 tablespoons melted butter, 1 cup warm water, 1 teaspoon apple cider vinegar. Slowly add to dry mixture, then add 3 room temperature eggs, one at a time (the mix should feel a little warm). Beat on high for 2 minutes. Cover with plastic wrap and a towel, and rise until doubled (time varies). After the first rise, beat the dough again for 3 minutes on high. Fill a large loaf pan 2/3 full (can use extra dough in muffin tins) Let rise until slightly over top of pan; bake at 350 for 30-45 minutes, covering with alum foil after the first 10 minutes. Delicious, and freezes pretty well.