Why does a butter get grainy? It’s all about the Fatty Acids.
Every Butter and Fixed oil used in making the beard butter contains its own unique fatty acid profile. Shea butter, for example, contains the following fatty acid profile: Oleic, Stearic, Linoleic, and Palmitic acids.
When a butter sits outside or in a warm bathroom all those fatty acids may melt or partially melt. Unfortunately, when they start cooling down the butter will cool too slowly and each fatty acid cools at its own rate.