To create a custom food, go to Foods, and select the plus (+) button in the top right corner.
Then, select Custom.
In the Custom Food Editor screen, enter the food's name, serving size (e.g. 1 piece, or 2 cups, etc.), and all of the nutrition information that you know.
Optionally, you can specify an icon or a photo.
To share the food with all users, please provide the UPC barcode and select the Publish to Database check box.
When you're done, don't forget to select Save. The food will appear in Foods > My Foods > Custom.