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Dinner · Part 2 of 3: Instructions

Rich French Onion Beef Meatballs Step-by-step instructions

A close-up of tender beef meatballs in a rich brown gravy topped with melted Swiss cheese in a slow cooker.
Prep
Cook
Total
Serves
4
Includes 5 min resting

Before you start

Gather all ingredients on your counter before starting to ensure a smooth workflow. Prepare the meatballs by shaping the beef into uniform portions so the texture remains consistent.

Ensure the slow cooker is plugged in and ready to go. Having the cheese shredded and the parsley chopped in advance allows for a quick transition from the slow cooker to the dining table once the cooking process is complete.

Ingredients at a glance (4)
  • 1 lb ground beef
  • 1 can French onion soup
  • 1 cup shredded Swiss cheese
  • fresh parsley, for serving

Instructions

Browning the Beef

  1. Prepare and Brown Meatballs
    In a large mixing bowl, shape the ground beef into uniform meatballs. Heat a skillet over medium-high heat and sear the meatballs until browned on all sides. This step locks in moisture and flavor before the slow cooking process begins.
    Look for meatballs are browned on all sides
    Tip Do not overcrowd the skillet to ensure even browning.

The meatballs should have a deep, golden-brown crust on all sides. This searing process ensures they hold their shape and provides the necessary foundation for the flavor of the gravy. Once they are browned, they are ready to be transferred to the slow cooker for the long simmer.

Simmering in Gravy

  1. Slow Cook in Onion Gravy
    Place the browned meatballs into the slow cooker. Pour the French onion soup over the meatballs, ensuring they are well-coated. Cover and cook on low heat for 4 hours until the meat is thoroughly cooked through to an internal temperature of 160°F (71°C).
    Look for meatballs are tender and fully cooked
    Safe temperature 160°F (71°C) internal temperature (ground meat)
    Tip Ensure the lid stays sealed to keep the moisture inside.

The aroma of caramelized onions should fill the kitchen. The meatballs should look tender and be fully submerged in the flavorful broth. At this stage, ensure the heat is consistent and the slow cooker has remained covered to maintain the steady temperature required for perfect doneness.

Melting the Cheese

  1. Melt Cheese and Garnish
    Once the meatballs are cooked, sprinkle the shredded Swiss cheese evenly over the top. Cover the slow cooker for an additional 5 minutes or until the cheese is completely melted and bubbly. Garnish with fresh chopped parsley before serving hot.
    Look for cheese is melted and bubbling
    Tip Watch closely so the cheese does not burn.

The cheese should be completely melted, forming a thick, bubbly layer over the meatballs. It should stretch when lifted with a spoon.

The parsley should be added just before serving to maintain its vibrant color and fresh, herbaceous flavor, providing a bright contrast to the rich, savory sauce.

Common mistakes

Avoid skipping the browning step, as the meatballs will lack depth of flavor and may become mushy in the sauce. Another common error is using pre-shredded cheese, which often fails to melt properly and leaves a grainy texture on top of the dish.

Be careful not to lift the lid of the slow cooker too frequently during the cooking process, as this releases heat and moisture, significantly increasing the total time required.

How to tell it’s done

The meatballs are done when they reach an internal temperature of 160°F (71°C) as measured by a meat thermometer inserted into the center of the largest meatball.

They should be firm to the touch and tender when pierced with a fork. The sauce should appear thickened and rich, with the onions softened and translucent, coating the meatballs perfectly.

  • Ground meat: 160°F (71°C) in the thickest part

Coming up in Part 3: common questions

  • Can ground turkey be used instead of ground beef?
  • Why did the cheese become rubbery?
  • Is it necessary to brown the meatballs?

Also in Part 3: variations (Spicy Onion Meatballs, Herbed Beef Meatballs), storage and make-ahead, and the printable recipe card.

Up next · Part 3 of 3

2 variations · storage & make-ahead · 3 answers · printable card

Tips, FAQ & printable recipe (Part 3)← Back to the ingredients (Part 1)