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Ingredients

• Sauce
• 1/4 cup packed light brown sugar
• 1/2 cup ketchup
• 2 tablespoons canned chipotle chiles in adobo sauce (about 3 chiles), plus 1 tbsp. sauce
• 1 tablespoon Worcestershire
• 2 tablespoons molasses
• 2 tablespoons orange juice concentrate
• 1 teaspoon minced garlic
• Burgers
• 1 1/4 pounds grass-fed ground beef
• 2 teaspoons each kosher salt and freshly ground black pepper, divided
• 1 red onion, sliced 1/4 to 1/2 in. thick crosswise
• 1 tablespoon vegetable oil, divided
• 4 slices Swiss cheese
• 4 sesame hamburger buns
• 4 slices ripe tomato
• 4 leaves butter or romaine lettuce

Description

MyRecipes