How can I bake some brownies without an oven?

Ok, so my oven’s busted (turns out, it’s probably a bad igniter). Unfortunately, I made a brownie mix right before finding this out. Is there any way I can bake this mix (Ghirardelli mix plus oil, water, and an egg) without an oven? Perhaps something involving my stove, fireplace, or microwave, either as a whole or per individual brownie? I’m kinda dying to eat these suckers already!