If you want to change the color of your butcher block countertop or hide any imperfections, staining is a great option. It's important to use a wood stain that is food-safe and non-toxic, such as a water-based stain or a natural dye, and apply it evenly with a brush or a cloth in the direction of the grain. Let it soak for about 10-15 minutes, then wipe off the excess with a clean cloth and let it dry for several hours. If you stain your butcher block, you should seal it with a food-safe sealer, such as a food-safe polyurethane.