I know, it's not really cooking, but one of my most favorite comfort-food snacks has always been cinnamon toast. Easy to make, and it always satisfies a craving for something sweet.
You can use the bread of your choice, I like white or wheat. You just toast the bread in the toaster, spread a thin layer of butter on one side of toast, sprinkle with the above mixture of sugar and cinnamon, and enjoy! (I think it tastes better cut into triangles)