A pickled pepper is a Capsicum pepper preserved by pickling, which usually involves submersion in a brine of vinegar and salted water with herbs and spices, often including peppercorns, coriander, dill, and bay leaf.
Common pickled peppers are the banana pepper, the Cubanelle pepper, the bell pepper, sweet and hot cherry peppers, the Hungarian wax pepper, the Greek pepper, the serrano pepper, and the jalapeño. They are often found in supermarkets alongside pickled cucumbers.
Pickled sliced jalapeños are also used frequently for topping nachos and other Mexican dishes. These peppers are a common ingredient used by sandwich shops such as Quiznos, Subway, and Wawa. Pickled peppers are found throughout the world, such as the Italian peperoncini sott'aceto and Indonesia's pickled bird's eye chili, besides the already-mentioned American and Latin American usages.
The flavored brine of hot yellow peppers is commonly used as a condiment in Southern cooking in the United States.