Ingredients

ONIONS

6 tablespoons Land O Lakes® Butter with Olive Oil & Sea Salt

1 large (2 1/2 cups) red onion, thinly sliced

1 large (2 1/2 cups) white onion, thinly sliced

1 large (2 1/2 cups) yellow onion, thinly sliced

1/4 teaspoon salt

1/4 teaspoon pepper

2 teaspoons sugar

1 teaspoon balsamic vinegar

BURGERS

1 pound lean ground beef

1 teaspoon balsamic vinegar

1/2 teaspoon salt

1/2 teaspoon pepper

1/2 teaspoon Worcestershire sauce

2 tablespoons Land O Lakes® Butter with Olive Oil & Sea Salt

8 (3 1/4-inch)  silver dollar or dinner rolls

Directions 

Melt 6 tablespoons Butter with Olive Oil & Sea Salt in 12-inch skillet over medium-high heat until sizzling; add onions, 1/4 teaspoon salt and 1/4 teaspoon pepper. Cook, stirring occasionally, 5 minutes or until onions begin to soften.

Stir in sugar; cook, stirring frequently and scraping brown bits off bottom of pan, 20-25 minutes or until onions are golden brown. Stir in balsamic vinegar. Remove onions from pan; keep warm. 

Combine all burger ingredients in bowl except butter and rolls; shape ground beef mixture into 8 equal-sized patties. 

Melt 2 tablespoons Butter with Olive Oil & Sea Salt in same skillet over medium heat until sizzling. Place patties into skillet; cook, turning once, over medium heat 6-8 minutes or until internal temperature reaches at least 160ºF and center is no longer pink.

Return onions to pan; continue cooking until onions are heated through. 

Place patties onto bottom half of buns; top with caramelized onions.

Serve immediately.