Source: Martha Stewart Living Television
Crafts enthusiasts have long known that a potato can be cut in half, carved into a stamp, and used to decorate everything from cards to cloth. Another idea is to use an apple and allow its natural shape to be the dominant decorative motif. Simply cut the apple in half from top to bottom, press the flesh side against a paper towel to absorb any excess moisture, and cover that side using an ink pad in the color of your choice. You can use this apple on bags, cards, book covers, or virtually any surface of your choice. Be sure to hold the apple down firmly and apply equal pressure to the top and sides. Reapply ink after each application. Once the image has dried, you can use a paint marker to add a stem and leaf.
If you want a thicker image, you can brush fabric paint onto the surface of the apple. Set the paint by allowing it to dry, placing a press cloth over the image, and using an iron set on medium.