The Best Burger Ever - Sutter Home Family Vineyards

Ingredients

• 2 lbs ground chuck
• 1 lb ground sirloin
• 3 tablespoons steak sauce
• 1 1/2 teaspoons kosher salt
• 3/4 teaspoon freshly ground pepper to taste
• 4 tablespoons room tempature unsalted butter
• 6 extra-large egg yolks
• cheese of your choice
• 12 hamburger buns