Homemade Beef Burgers

Ingredients

• 4 to 6 slices sharp cheddar (or other favorite cheese)
• ketchup
• mustard
• 1 small onion (red or white)
• hamburger relish
• 4 to 6 large iceberg lettuce leaves
• hamburger pickles
• 1 ripe tomato
• mayonnaise
• any other fixings you like
• 4 to 6 soft burger buns
• 14 oz brisket
• 18 oz chuck (with at least 20% fat content)
• 1 tsp kosher salt
• 1 tsp freshly ground black pepper
• kosher or maldon salt (to taste)
• freshly ground black pepper (to taste)
• 2 to 4 tsp unsalted butter (optional)