Wash mushrooms and trim stems, but do not completely remove all of the stem. Heat oil in a deep fryer, such as a "Fry-Daddy" or deep skillet with enough oil to cover. Use either commercial "Mushroom Batter" mix or a mix like Bisquick for the batter. Mix the batter according to package directions, except use beer as liquid instead of water or milk. Deep-fat fry the 'shrooms, until golden brown and drain on paper towels. Buny's Note: these are good with creamy horseradish sauce.