You need some sort of leavening. Baking podewr can be substituted with other pantry ingredients. Keeping in mind that a chemical rise dough is a biscuit dough (like UNO thick crust). You can make a biscuit dough with baking soda and cream of tartar or baking soda and buttermilk.If you have none of these, then all you can make is a unleavened bread and it is not the best base for a pizza but it can be done. Here's what to do if you do not have the aboveMake the dough as you would for pizza but with twice the oil.Roll out unleavened dough very thin, (1/8 ) to make a cracker type crust, no larger than a dinner plate, for strength, since they're thin.. Prick the crust all over with a fork, lay out on an oiled cookie sheet with cornmeal to stop sticking.Precook a little in a 300degree oven til set but not brown,Cover with toppings and bake in a 400F oven til toppings are brown.