Caviar Butter This page first published: Jan 25, 2006 · Updated: Jun 23, 2018 · by CooksInfo. Copyright © 2021 · This post may contain affiliate links · This blog generates income via ads · Caviar butter is a garnish for cold hors-d’oeuvre, some canapés and some fish dishes. It consists of 1 part caviar ground in a mortar, blended with 2 parts beurre pomade (soft butter), then pressed through a sieve.