A butter board is a thrifty option compared to meat and cheese boards, so splurge on the best quality ingredients you can find, like fuller-fat European butter. Whip the butter for easy spreading. Layer additional flavors on top. I use one or more of the following elements to create a balance of texture and taste.
Salt: Use unsalted butter as the base, then add table salt to taste during the whipping stage, and/or a flurry of fleur de sel on top. Try this: table salt + diced olives + feta crumbles