I’ve heard you cannot brown bread, is that true? A I’ve heard you cannot brown bread, is that true? This is simply not true. You can brown bread in the SunFocus® or UGLI™. Back to Top Post navigationPrevious post: How much do I have to alter recipes to cook solar?Next post: I thought you could not get a solar oven hot enough to boil to sterilize water, only a parabolic cooker can. Does yours boil?