Mix rice flour, sweet rice flour, sorghum flour, xanthan gum and agar together. In a separate bowl, combine egg, milk, butter and honey.

Make a well in the dry mixture and add the liquids. Mix together using a fork, gradually incorporating the dry ingredients into the wet. The dough should be soft but not sticky. If dough is too dry, add more milk.

Gather dough into a flat cake. Wrap in plastic wrap until ready to use. Dough may be refrigerated for later use but should return to room temperature before it is rolled out.