Slow Cooker Meatloaf with Caramelized Onions

Some weeknight dinners practically make themselves, and this Slow Cooker Meatloaf is one of them. Tender, juicy, and crowned with sweet caramelized onions in a rich savory sauce, it’s classic comfort food made effortless — just mix, set, and forget until dinner.

Why You’ll Love This Recipe

• Effortless cooking: the slow cooker does all the work, with no babysitting required.
• Incredibly juicy: gentle, slow heat keeps every slice moist and tender.
• Caramelized onion magic: sweet, golden onions take this weeknight staple to dinner-party status.
• Easy cleanup: everything simmers together in one pot of rich, savory sauce.

Ingredients

• 2 lbs ground beef
• 1 cup breadcrumbs
• 1 large egg
• 1 onion, finely chopped
• 3 cloves garlic, minced
• 1/2 cup milk
• 2 tablespoons Worcestershire sauce
• 1/2 cup ketchup, divided
• 1/4 cup brown sugar
• 1 tablespoon Dijon mustard
• 1 teaspoon Italian seasoning
• 1 teaspoon salt
• 1/2 teaspoon black pepper
• 1 tablespoon olive oil

Instructions

1. Mix the meatloaf: In a large bowl, combine the ground beef, breadcrumbs, egg, half of the chopped onion, garlic, milk, Worcestershire sauce, 1/4 cup of the ketchup, Italian seasoning, salt, and black pepper. Mix gently with your hands until just combined — don’t overmix.
2. Shape and place in slow cooker: Form the mixture into a loaf and set it in the bottom of a lightly greased slow cooker.
3. Make the caramelized onion topping: Heat the olive oil in a skillet over medium heat. Add the remaining onion and cook, stirring occasionally, until soft and golden, about 10 minutes. Stir in the remaining 1/4 cup ketchup, the brown sugar, and the Dijon mustard, then spoon the mixture over the meatloaf.
4. Slow cook: Cover and cook on LOW for 6–7 hours or on HIGH for 3–3 1/2 hours, until the meatloaf is cooked through and reaches an internal temperature of 160°F (71°C).
5. Rest and serve: Let the meatloaf rest for 10 minutes so the juices redistribute, then slice and spoon the rich savory sauce from the slow cooker over each piece.

Serving Suggestions

• Serve over creamy mashed potatoes or buttered egg noodles to soak up the savory sauce.
• Add a simple green salad or roasted vegetables for a fresh, balanced plate.
• Pile leftovers into a sandwich the next day — they reheat beautifully.

Storage Tips

Let the meatloaf cool completely, then refrigerate it in an airtight container for up to 4 days. Reheat gently in the microwave or oven with a spoonful of the sauce to keep it moist. It also freezes well for up to 3 months; thaw overnight in the refrigerator before reheating.