In a saucepan, bring beer to a gentle boil over medium low heat. Whisk in flour until smooth. Whisk in cheese, whipping cream and cream cheese until smooth. Whisk in paprka, mustard, sale and pepper. Set aside.
Preheat grill to medium heat.
In a large bowl, mix beef, sausage meat, salt and pepper with your hands until well combined. Divide into 8 and shape each mound into 3/4 inch (2 cm) thick patties. Gently make a small divot in the centre of the burger.
Place burgers on greased grill over medium heat and grill, turning once after about 15 minutes or until no longer pink inside or meat thermometer registers 165°F (74°C).
Spread butter on cut sides of buns and toast lightly on grill. Top bottom buns with lettuce. Place patties on top and spoon Gouda Beer Cheese Sauce over top. Top with buns.