Store fresh elderberries in your refrigerator. They can be frozen (with the stems off) for long term storage.
Up to two weeks refrigerated.
Elderberries should be cooked before consumption. Use them in jams, jellies, chutneys and other preserves, pie fillings, nonalcoholic cordials, wine, vinegar, etc.
Try pairing them with flavors like fruit (in general, but particularly apples or crabapples) or sumac.
When using elderberries in preserves, they typically need additional pectin (either through complimentary fruits in the jam or pectin added directly) to set.