Soup pasta is a type of dish that combines two classic comfort foods: soup and pasta. The three most common types of soup pasta are NOODLES, orzo, and udon. NOODLES are a type of thin, unleavened dough made from wheat flour, water, and salt, and are usually boiled in a broth to make a soup. Orzo is a type of pasta shaped like a large grain of rice, and is often used in soups. Udon is a type of thick, white wheat-flour noodle that is also commonly used in soups.