An hour is probably an average. You can speed the time by putting the dough in a very low temp oven, or setting the pan it is in over a pot of lightly steaming water. Use a wire rack across the top of the water pan. A single batch of dough can be forced to rise in 20 to 30 minutes. Generally, the faster the dough rises the coarser the end product is going to be. There are a lot of variables in bread making. An hour is probably an average. You can speed the time by putting the dough in a very low temp oven, or setting the pan it is in over a pot of lightly steaming water.