Preheat oven to 275 degrees.
Take the used grounds (or puck) from the espresso maker and spread them out on a cookie sheet.
Bake for 20 minutes.
Take the flat side of a spoon and make sure the powder is evenly spaced, then bake for an additional 10 minutes.
Grounds should be totally dry.
Grind dry coffee in a coffee grinder to ensure it will disappear when added to recipes.
Enjoy the wonderful free smells!