This slow cooker Korean beef delivers bold, savory-sweet flavor with minimal effort. Perfect for a hands-off weeknight dinner the whole family will love.
Place the thinly sliced flank steak in the slow cooker.
In a bowl, whisk together the soy sauce, brown sugar, sesame oil, rice vinegar, sriracha, minced garlic, and grated ginger until the sugar dissolves. Pour the sauce over the beef and toss to coat all the pieces.
Cover and cook on low for 5 to 6 hours or on high for 2 1/2 to 3 hours, until the beef is very tender and the flavors have melded together beautifully.
In a small bowl, mix the cornstarch with cold water until smooth. Stir the slurry into the slow cooker.
Turn the heat to high, cover, and let the sauce thicken for about 15 minutes, stirring once.
Serve the Korean beef over steamed white rice, generously garnished with sesame seeds and sliced green onions. For extra freshness, add a quick cucumber salad on the side.