In a medium-sized mixing bowl, whisk together the flours, salt, baking powder, sugar, and sesame seeds. Using a pastry fork or blender, your fingers, or a mixer, cut in the butter and shortening, and add the sesame oil. Stir in enough water for the dough
Divide the dough into four pieces; each will weigh about 4 1/2 to 4 7/8 ounces. Working with one piece at a time, roll the dough into a rough 9- to 10-inch circle; it should be a scant 1/8-inch thick. Repeat with the remaining pieces of dough.
Place the dough circles on a parchment-lined baking sheet (or on a piece of parchment paper, if you?re going to bake them on a stone). Bake them in a preheated 400Â°F oven for 14 to 16 minutes, or until they?re golden brown around the edges.