If you want to preserve food for display, there are several things you need to know. Not all foods can be preserved. The best options are those that have low-moisture content and easily become stale if left in a cool, dry place. The uses for your preserved food include: theater props, restaurant display and home decor.
Turn your oven on to the lowest temperature setting and place your food inside with the door open. Leave the food in the oven until it has become stale and dried out. This is the best method to use for breads and rolls.
Leave the food out on the counter, uncovered for several days until it has dried out completely. This is best for items such as cookies, cakes and pastries. Place a mesh food cover over the food to allow air to circulate but keep out pests.
Paint a layer of varnish or clear lacquer over the food after it has completely dried. Be sure to cover all sides. Let dry thoroughly for at least 24 hours.
Apply a second layer of varnish or clear lacquer to ensure that you have completely covered the food. Let this second layer dry completely, then use the preserved food in any display application.