Creating Slow Cooker Korean Beef is straightforward. Follow these steps to ensure a delicious outcome:

1. Prepare the Beef: Trim excess fat from the beef chuck roast and cut it into large chunks.

2. Mix the Sauce: In a bowl, combine soy sauce, brown sugar, rice vinegar, sesame oil, minced garlic, minced ginger, black pepper, and red pepper flakes. Whisk until well blended.

3. Add to Slow Cooker: Place the beef chunks in the slow cooker and pour the sauce over the beef, ensuring it’s well coated.

4. Cook: Cover the slow cooker and set it to low for 8 hours or high for 4 hours. The beef should become tender and easy to shred.

5. Shred the Beef: Once cooked, remove the beef from the slow cooker and shred it with two forks. Return the shredded beef to the sauce in the slow cooker and stir to combine.

6. Garnish: Before serving, sprinkle chopped green onions and sesame seeds on top for added flavor and a beautiful presentation.

7. Serve: Serve the Slow Cooker Korean Beef over cooked rice or noodles, allowing the sauce to soak in.

This simple yet delicious process will guide you to create an incredible meal that everyone will love!