This video shows us how to make a smoke bomb out of confectioner's sugar Things you'll need: saltpeter, confectioner's sugar, disposable cup, lighter, and napkin. How to make a smoke bomb: Mix 1 part confectioner's sugar and 1 part saltpeter. It must be mixed very well. Transfer mixture into the disposable cup. Put napkin inside the cup and shake the cup. Outside, lie down the cup. Ignite the cup using a lighter.