Placing a damp towel under a cutting board prevents it from slipping, providing a stable and safe surface for cutting and chopping. This enhances control and reduces the risk of accidents.
A cutting board, especially a lightweight one, can easily slide around on a smooth countertop surface like granite, marble, or even some wood finishes. This movement can be dangerous when you're using sharp knives. The damp towel creates friction between the cutting board and the countertop. The moisture in the towel fills the microscopic gaps and irregularities on both surfaces, increasing the contact area and thus the friction. This increased friction effectively anchors the cutting board, preventing it from slipping or sliding while you're cutting, chopping, or slicing. The dampness is key; a dry towel won't provide the same level of grip.
Use a thin, absorbent kitchen towel or paper towel. Avoid using a thick, plush towel, as it can create an uneven surface and make the cutting board wobbly. Also, ensure the towel is damp, not soaking wet, to prevent water from seeping under the cutting board and potentially damaging your countertop.