How to prevent homemade butter from melting/separating under hot conditions Please, I'm making homemade butter that will be kept and served at an outdoor event. What process/additive/ingredient can I add to preparation that will prevent the butter from separating or melting in the outdoor heat(or under direct sunlight). Thanks.
You can't.

fat is fat and will melt under hot conditions.

Keep it cool, put it over some ice.