This Slow Cooker Korean Beef is a simple, flavorful meal featuring tender flank steak in a savory-sweet sauce with soy, brown sugar, garlic, and ginger. Prep it in just 10 minutes, then let the slow cooker do all the work. Serve over rice or noodles for a satisfying weeknight dinner.
Place sliced flank steak and cornstarch into a Ziplock bag. Close and shake until completely coated. Then add to the bottom of a 6-quart crock pot.
Add sesame oil, garlic, fresh ginger, rice vinegar, soy sauce, beef broth, brown sugar, and red pepper flakes to a medium bowl. Whisk until well combined and pour over flank steak.
Cover and cook on high for 2-3 hours or on low for 4-5 hours.
Serve over rice and garnish with green onions.
Notes
Toss the beef in cornstarch before cooking to help thicken the sauce and give it a glossy finish.
Slice the flank steak against the grain to ensure each bite stays tender and juicy.
Whisk the sauce ingredients thoroughly so the flavors are well combined, and coat the beef evenly.
Cook on low for the recommended time to allow the beef to become perfectly tender and flavorful.