After reading this question and the corresponding answer, I tried to get a confusion matrix produced by GEE random forrest classifier and turn it into a good looking table. I realized that GEE has a separate object of "ee.ConfusionMatrix" enhanced with a method ".array()" which casts a confusion/error matrix to an array. Consequently one can get the resulting "array" and turn it into a "list": ee.ConfusionMatrix.array().toList(); The result however is not exactly a list.