What ingredient is in wine bread and peanut butter?

The ingredient that's in both wine bread and peanut butter is wine.

* Wine bread is a type of bread that uses wine as an ingredient, typically red wine.

* Peanut butter is sometimes flavored with wine, particularly red wine, to add complexity and depth of flavor.

While this might seem unusual, adding wine to both bread and peanut butter is a common practice to enhance flavor.