We have west coast American brewers to thank for this somewhat reactionary style. Take an India Pale Ale and feed it steroids, and you'll end up with a Double or Imperial IPA. Although generally recognizable alongside its sister styles in the IPA family, you should expect something more robust, malty, and alcoholic with a characteristically intense hop profile in both taste and aroma. In short, these are boldly flavored, medium-bodied beers that range in color from deep gold to medium amber. The "imperial" usage comes from Russian Imperial Stout, a style of strong Stout originally brewed in England during the late 1700s for the Russian imperial court. Today Double IPA is often the preferred name in the United States.