In butter sweat onion, carrots, celery and pepper over medium heat for 15 minutes, until soft. Add thyme, potato, and chicken stock; simmer until potato is soft, about 15 minutes. While this is simmering, make the roux: melt 1/2 cup butter over medium-low heat. Stir in flour, stir 5 minutes; do not brown. When potato is soft, whisk roux into pot; stir and allow to thicken. Add beer, continue to stir. Add milk; stir to combine; allow to simmer for a few minutes, stirring occasionally. Add mustard, sauces, salt and pepper; taste to adjust seasonings. Whisk in cheddar, taste again. Do not allow soup to boil after adding cheese. Pour into bowls, topping each bowl with 2 tablespoons grated cheddar and a little fresh parsley.
This recipe was provided by a chef, restaurant or culinary professional. It has not been tested for home use.
Recipe Courtesy of Amy Chamberlain, The Perfect Wife