Sentence:  With its tart, light sauce made from rich silky Guatemalan-style cultured cream, the dish is unabashedly luxurious and more ... Revolcado, a soupy pork-head stew— the waitress was shocked when I ordered it—it is an <WSD>ultrarich</WSD> spicy broth, the product of simmering a pork head until the meat falls away. 
Meaning of the word marked with <WSD> tags:  Extremely rich in flavor; very sweet, fatty, or intensely flavorful.