Slow Cooker Garlic Butter Beef (Print Version)
Sirloin becomes extra tender in a garlic butter sauce—perfect over mashed potatoes, rice, or noodles.
# What You'll Need:
→ Main Ingredients
01 -
2 pounds sirloin steak, cut into 1-inch cubes
02 -
1 teaspoon kosher salt
03 -
1/2 teaspoon freshly ground black pepper
04 -
2 tablespoons vegetable oil
→ Aromatics & Sauce
05 -
1 large sweet onion, thinly sliced
06 -
4 cloves fresh garlic, finely minced
07 -
1 cup unsalted beef stock
08 -
1 packet au jus gravy mix (about 1 ounce)
09 -
6 tablespoons unsalted butter, cut into pieces
# Steps to Follow:
01 -
Evenly coat sirloin steak pieces with kosher salt and black pepper.
02 -
Heat vegetable oil in a large skillet over medium-high heat. Once hot, sear beef cubes in batches until browned on all sides, avoiding overcrowding to ensure proper caramelization.
03 -
Transfer seared beef to the slow cooker. Add sliced sweet onion and minced garlic, distributing them evenly.
04 -
Pour unsalted beef stock gently over the beef mixture. Sprinkle au jus gravy mix evenly across the surface.
05 -
Distribute unsalted butter pieces across the top of the assembled ingredients.
06 -
Cover and cook on low for 6 hours, or until beef is fork-tender. Stir once per hour if possible for even flavor distribution.
07 -
Test for doneness by checking if beef shreds easily with a fork. Serve hot over mashed potatoes, rice, or noodles.
# Additional Notes:
01 -
For optimal searing, ensure skillet is fully hot before adding oil and do not overcrowd the pan.
02 -
Storing leftovers in airtight containers in the refrigerator up to 3-4 days enhances flavor development.
03 -
Freeze in portions for up to 3 months; reheat gently on the stovetop to retain sauce consistency.