The classic Peanut Butter and Jelly sandwich once had a “cousin.” Was it:

C.

Peanut Butter and Mayonnaise, now largely forgotten, was once as popular a pairing as PB & J. During the Great Depression, people were looking for high-calorie combinations of protein and fat. Meat and dairy were expensive and consuming enough energy could prove difficult. Thus, the combination of peanut butter and mayonnaise on white bread was born and became a staple in Southern households in the United States. For the next 30 years or so, the PB & M was a favorite in many American kitchens, perhaps because adding mayonnaise to the era’s rustic, coarse nut butter may have been key for spreadability.