Eskimo ice cream

The Inuit people of Alaska have a distinct version of ice cream. It's not creamy
ice cream as we know it, but a concoction made from
reindeer fat or tallow, seal oil, freshly fallen snow or water, fresh berries, and sometimes ground fish. Air is
whipped in by hand so that it slowly cools into foam.
They call this Arctic treat akutaq, aqutuk, ackutuk, or
Eskimo ice cream. Akutaq is a Yupik word that means mix
them together.

Here is the link.  Nowadays Crisco Oil often substitutes for animal fat.

Here is a picture of Eskimo ice cream.

The original tip is from 1001 Foods You Must Taste Before You Die, an excellent book for reading or browsing.