"Spreading butter or mayonnaise on your bread will help insulate and waterproof it from wetter ingredients like tomatoes"
Mayo and other fatty sandwich spreads can actually do double duty, adding moisture in the right places while preventing excessive sogginess in the wrong ones. "Water will dance off a fat," explains Bianco. "Spreading butter or mayonnaise on your bread will help insulate and waterproof it from wetter ingredients like tomatoes."
Mayo and other fatty sandwich spreads can actually do double duty, adding moisture in the right places while preventing excessive sogginess in the wrong ones. "Water will dance off a fat," explains Bianco. "Spreading butter or mayonnaise on your bread will help insulate and waterproof it from wetter ingredients like tomatoes."