Mac and Cheese with Chips and Beer | Club House

Ingredients

• 3 tbsp (45 ml) butter
• 1 small onion, diced
• 1/4 cup (60 ml) all-purpose flour
• 1 (330 ml) bottle beer (lager or ale)
• 1 cup (250 ml) milk
• 2 tsp (10 ml) mustard ground (club house)
• 1/2 tsp (2 ml) sea salt grinder (club house)
• 1 pinch pepper ground cayenne (club house)
• 2 1/2 cups (625 ml) shredded old Cheddar cheese
• 2 cups (500 ml) elbow macaroni
• 1 cup (250 ml) lightly crushed plain or salted potato chips (about 60 g)