Save your orange peels - Instead of throwing out orange peels, place them in a ziplock bag in the freezer until it is full.

Dehydrate - If you have a dehydrator, lay all of the orange peels in a single layer on the trays. Dehydrate at least 6 hours, or until they are crispy. You can also leave out them to air dry, which will take several weeks.

Grind - Use a spice grinder or food processor to grind the peels into a fine powder.

Store - Place your orange peel powder in an air-tight container to store for use in your recipes.