Onion and Mushroom-Stuffed Burger

Mushrooms and caramelized onions are tucked into the center of ground beef patties before grilling.

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4 users rated this recipe an average rating of 3.0
Makes:
8 servings
Prep:
50 mins
Grill:
25 mins
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Onion and Mushroom-Stuffed Burger

Ingredients
1 1/2
cups sliced onions (about 3 medium)
8
ounces button or cremini mushrooms, sliced (3 cups)
1
tablespoon olive oil
2
tablespoons snipped fresh parsley
2 1/2
pounds 85-percent lean ground beef
1/3
cup Worcestershire sauce
4
1 1/2
teaspoons salt
1
teaspoon ground black pepper
16
slices applewood smoked bacon (about 1 lb.) (optional)
8
slices Swiss, provolone, and/or Colby and Monterey Jack cheese (optional)
8
Kaiser rolls or hamburger buns, split and toasted*
 
Tomato slices (optional)

Directions

  1. In very large skillet cook the onions and mushrooms in hot oil over medium heat 15 to 20 minutes or until all liquid has evaporated, and onions and mushrooms are tender and golden brown, stirring occasionally. Remove from heat. Stir in parsley; set aside to cool slightly.
  2. In a very large mixing bowl mix beef, Worcestershire sauce, garlic, salt, and pepper until just combined (do not over mix). Shape mixture into 16 (3-1/2-inch diameter) patties. Spoon filling onto half of patties to 1/2-inch of edge. Top with remaining patties; pinch to seal. If using, lay 2 bacon slices over each stuffed patty in crisscross pattern, tucking ends under.
  3. For charcoal grill, arrange preheated coals around drip pan. Test for medium heat above pan. Place patties over drip pan on grill rack. Cover and grill 25 to 30 minutes or until done (160 F)**. (For gas grill, preheat grill. Reduce heat to medium. Adjust for indirect grilling. Grill as above.) Top with cheese. Cover; cook 1 to 2 minutes more or until cheese melts.
  4. Transfer burgers to serving platter. Serve on buns with tomato slices. Makes 8 servings.

From the Test Kitchen

*

Toast the buns directly over hot coals during last 1 to 2 minutes of grilling.

**

If you wrap the burgers with bacon they will take a little longer to grill than unwrapped burgers.

Nutrition Facts

(Onion and Mushroom-Stuffed Burger)
    Per serving:
  • 516 kcal cal.,
  • 26 g fat
  • (9 g sat. fat,
  • 96 mg chol.,
  • 954 mg sodium,
  • 37 g carb.,
  • 2 g fiber,
  • 33 g pro.
  • Percent Daily Values are based on a 2,000 calorie diet
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