Aronia berries are small fruits that are dark red or black in color. They have a slightly tart taste and are often used in jams, juices, and other foods. Full definition
There are suggestions for substitutions (like swapping unsweetened cranberry juice for aronia berry juice) but they are usually highlights to a recipe and could easily be omitted. (tastespace.wordpress.com)
I found a recipe for aronia berry pie on line and attempted one Saturday night. (bluejeansandcottontees.com)