Brown butter is regular butter that decided to be more interesting. When the milk solids toast in the pan you get this nutty, caramel-forward depth that changes everything it touches.
If you haven’t made it before, start with the brown butter guide, then come back and put it to work in a plate of scallop pasta, a bowl of garlic mashed potatoes, or a tray of roasted pecans. Learn it once and you’ll find yourself reaching for it constantly.