This simple, speedy brownie recipe is made in the microwave, so there's no need to fire up the oven. Place the butter and chocolate into a microwave-safe mug ... to cool for 1 minute then serve ...

Place the mug in the microwave and cook for about 2 minutes. To know if it's done, look for bubbles on the surface. You can also check by inserting a fork into the brownie; if it comes out clean ...