If you’re lucky enough to have butcher block countertops (or even just a few nice wooden cutting boards) in your home, it’s important to take good care of them. Thankfully, doing so is easier than you might imagine.
When you first get a new butcher block, the key is to keep it from drying out. To keep it conditioned, rub a small amount of mineral oil (or olive or grapeseed-oil if you want to avoid petroleum) onto the surface with a paper towel once a month. After about six months, you can cut back and just oil as needed.
And remember to avoid leaving your cutting board in standing water to prevent it from being ruined.