This is a thing today. Coffee lovers started using butter as an ingredient in their coffees. They dub this as the “bulletproof” coffee. It has anti-inflammatory effects and metabolism increasing properties. There are many skeptics on the rise of the bulletproof coffee, though. However, as they use grass-fed butter, they avoid using salted butter. (It will make your coffee taste like a total mess). You can try this and it may work for you too.