Bubble and squeak is the British dish that combines mashed potatoes and cabbage or other greens, usually frying the mixture until browned.
The name refers to the sounds the vegetables can make as they cook in a hot pan. The dish traditionally uses leftovers from a roast dinner, especially potatoes and cabbage, although onions, carrots, peas, Brussels sprouts, or other cooked vegetables may also be included.
Bubble and squeak is commonly shaped into a single large cake or several smaller patties. It is often served as a breakfast or brunch food, sometimes with bacon, eggs, sausages, or leftover roast meat. Recipes vary considerably by region and household.
It is sometimes confused with Irish colcannon, which is a mashed-potato dish mixed with cabbage or kale and usually served freshly mashed rather than fried as a leftover preparation. Scottish rumbledethumps is another related potato-and-cabbage dish, but it is a distinct Scottish recipe.