Cowboy Butter Sirloin Tips and Potatoes: Slow Cooker

This slow-cooker dinner delivers fork-tender sirloin tips and buttery baby potatoes simmered in a rich garlic-herb butter au jus. With just a few minutes of prep and a long, gentle cook, the meat becomes incredibly tender and the potatoes soak up all the savory flavors.

It's a set-it-and-forget-it meal that feels special enough for a weekend dinner but easy enough for a busy weeknight. Serve it over creamy mashed potatoes or with crusty bread to soak up every last drop of the delicious gravy.

Sirloin tips are a flavorful, budget-friendly cut that becomes meltingly tender when cooked low and slow. This recipe layers them with baby Yukon Gold potatoes, minced garlic, and two sticks of garlic-herb cowboy butter, then sprinkles on au jus mix for a rich, savory gravy.

The slow cooker does all the work, turning simple ingredients into a hearty, satisfying dinner. The result is a dish that tastes like it simmered all day, because it did. Perfect for family dinners, game day, or any night you want a comforting meal without much fuss.

Ingredients

Why this recipe works

Slow cooking is the secret to transforming tough, affordable sirloin tips into fork-tender bites. The low heat gently breaks down the connective tissue without drying out the meat, so every piece stays juicy and succulent. The long cooking time also allows the flavors of the garlic, herbs, and au jus to penetrate deep into the beef and potatoes, creating a deeply savory dish that tastes far more complex than its simple ingredient list suggests.

The combination of cowboy butter and au jus mix creates a rich, glossy sauce that clings to the meat and potatoes. Cowboy butter, with its garlic and herb notes, adds a luxurious richness, while the au jus provides a savory, umami backbone.

As the butter melts and the au jus dissolves, they meld into a golden gravy that coats every bite. The potatoes absorb some of that liquid, becoming soft and buttery, while the beef stays moist and flavorful.

Notes and substitutions

Sirloin steak tips are the star here. Look for tips that are already cut into bite-sized pieces, or buy a whole sirloin and cut it yourself. The marbling in sirloin keeps the meat moist during the long cook. Baby Yukon Gold potatoes hold their shape well and have a creamy texture that pairs beautifully with the rich sauce. If you can't find baby Yukon Golds, regular Yukon Golds cut into chunks work just as well.

Garlic-herb cowboy butter is a flavored butter that typically includes garlic, parsley, chives, and sometimes a touch of cayenne or smoked paprika. It adds a burst of flavor that plain butter can't match.

If you don't have cowboy butter, you can make your own by mixing softened unsalted butter with minced garlic, chopped fresh herbs, salt, and pepper. Au jus mix is a powdered seasoning that creates a savory gravy; it's available in most supermarkets near the gravy mixes.

• sirloin steak tips: Chuck roast cut into chunks works well; increase cook time to 8 hours for tender results.
• baby Yukon Gold potatoes: Red potatoes or fingerlings can be used; cut larger ones into halves or quarters.
• garlic-herb cowboy butter: Use 1/2 cup unsalted butter mixed with 1 tsp garlic powder and 1 tsp dried herbs such as parsley, thyme, and chives.
• au jus mix: Use 1 cup beef broth plus 1 tsp Worcestershire sauce and 1/2 tsp onion powder for a homemade alternative.

Equipment

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