Slow-Cooker French Onion Sirloin Tips with Garlic Herb Butter

This slow-cooker French Onion Sirloin Tips recipe is the ultimate set-it-and-forget-it dinner. Tender pieces of sirloin slow-cook with sweet Vidalia onions, rich beef consommé, and a generous amount of garlic herb butter until they're melt-in-your-mouth tender.

The result is a deeply savory, buttery sauce that's perfect over mashed potatoes or crusty bread. With just five ingredients and five minutes of prep, this meal delivers big flavor with minimal effort.

Imagine coming home to the aroma of slow-cooked beef, caramelized onions, and garlic butter wafting through the kitchen. That's what this recipe delivers with barely any effort. Just toss sirloin tips, onions, consommé, au jus mix, and garlic herb butter into a slow cooker, and let time work its magic.

The beef becomes fork-tender, the onions melt into silky ribbons, and the sauce turns into a rich, savory gravy. Serve it over mashed potatoes for a meal that feels special but is secretly simple. This is comfort food at its most effortless.

Ingredients

Why this recipe works

Slow cooking is the key to transforming tougher cuts like sirloin tips into fork-tender morsels. The low, gentle heat breaks down connective tissue while allowing the beef to absorb the flavors of the consommé, onions, and butter.

The result is meat that's juicy and full of umami, with a sauce that's deeply savory and rich.

The combination of beef consommé, au jus mix, and garlic herb butter creates a triple-layered flavor base. The consommé adds depth, the au jus mix brings saltiness and seasoning, and the butter contributes richness and a silky mouthfeel.

As the onions cook down, they release natural sugars that caramelize and meld with the other ingredients, creating a complex, satisfying gravy.

Notes and substitutions

Sirloin tips are ideal for slow cooking because they have enough marbling to stay moist during long cooking times. If you can't find sirloin tips, you can use chuck roast cut into chunks or round steak, but adjust cooking time accordingly. Vidalia onions are sweet and mild, but any sweet onion or yellow onion will work.

Garlic herb butter is available in the dairy section of most supermarkets, but you can make your own by mixing softened butter with minced garlic, parsley, thyme, and a pinch of salt. For a gluten-free version, ensure the au jus mix and consommé are gluten-free, or substitute with a gluten-free beef broth and seasonings.

• Vidalia onions: Sweet onions like Walla Walla or Maui, or yellow onions for a sharper flavor
• Beef consommé: Beef broth with a pinch of onion powder, or use a rich beef stock
• Garlic herb butter: Use 4 tablespoons unsalted butter mixed with 2 minced garlic cloves and 1 teaspoon dried herbs (thyme, rosemary)
• Dry au jus mix: Use 1 tablespoon Worcestershire sauce plus 1 teaspoon onion powder and 1/2 teaspoon garlic powder

Equipment

• 6-quart slow cooker
• Cutting board
• Chef's knife
• Measuring cups
• Measuring spoons
• Serving spoon