A blooming onion, onion bloom, onion blossom, or onion 'mum is a food dish consisting of one large fried Vidalia onion which is cut to resemble a flower. It is served as an appetizer at some restaurants.
The name of the dish comes from its menu name at Outback Steakhouse ("Bloomin' Onion"), which claims to be the dish's inventor. The dish was a charter feature of the restaurant chain when it opened in 1988, and is still a favorite. Its popularity has led to its adoption as an appetizer at various other restaurant chains, most notably Lone Star Steakhouse & Saloon, it is best known as the "Texas Rose". The blooming onion is usually served with a restaurant specific signature sauce.
The egg wash and deep frying preparation process of the blooming onion means it can be relatively high in calories. A single blooming onion with dressing has been reported to contain approximately 2,210 calories and 134 grams of fat. A study by the Center for Science in the Public Interest found a slightly lower fat content of 116 grams, including a combined 44 grams of saturated and trans fat. When it existed, the similar style Awesome Blossom at Chili's was ranked Worst Appetizer in America by Men's Health Magazine in 2008 for the unusually high totals of calories and fat, with 2,710 calories, 203 grams (1,827 calories) of fat, 194 grams of carbohydrates, and 6,360 miligrams of sodium, with as much fat as 67 strips of bacon.