This morning I was making toast and of course when you take the butter out of the fridge it's IMPOSSIBLE to spread without destroying your bread. So I Googled "How long can I keep butter out before it goes rancid?" and here's what I found out.
Butter usually can be kept out for several days without going rancid (salted butter will keep longer because salt acts as a preservative). Exactly how long butter will stay fresh at room temperature depends on how much heat and light it gets and whether it’s wrapped.
Margarine Vs Butter ~ Truth & Fiction
One thing I had that worked out great was this Butter crock. You replace the water in it every 3 days and your butter can stay out for a month...LOVED IT! It was under $20.00 and well worth it.
Some of you might say...."Ohhhh butter is bad, cholesterol, fattening". I say SHUT UP!! Eat in moderation dammit and enjoy the wonder that is butter!
I made a video a while ago showing 2 ways you can double your butter.