Better Than Fast Food! Classic Smash Burger Recipe

INGREDIENTS:
1 1/2 pounds Certified Angus Beef ® ground beef, 80/20 lean
1/2 cup mayonnaise
1 tablespoon yellow mustard
1 tablespoon grated yellow onion
2 teaspoons hot sauce
1 teaspoon Worcestershire sauce
4 white hamburger buns
2 tablespoons butter, room temperature
1 1/2 teaspoons kosher salt
1/2 teaspoon pepper
4 slices American cheese
2 cups shredded iceburg lettuce
8 slices vine-ripe tomatoes