Cookwith - Classic Cheddar Cheeseburger with Brioche Bun

Ingredients

• 2 brioche burger buns
• 2 (1/3 lb) ground beef patties (80/20 blend)
• 2 slices cheddar cheese
• 2 leaves green leaf lettuce
• 4 slices ripe tomato
• 4 rings red onion
• 2 tbsp mayonnaise
• 1 tsp yellow mustard
• 1/2 tsp kosher salt
• 1/2 tsp freshly ground black pepper
• 1 tbsp unsalted butter (for toasting buns)