Easy Slow Cooker Mongolian Beef Step-by-step instructions

Before you start

Before starting, ensure all ingredients are properly measured and ready. Thinly slice the flank steak against the grain to ensure tenderness. Have the slow cooker placed on a flat, heat-resistant surface near an electrical outlet.

Keep the ingredients organized near your workspace to facilitate the quick assembly process, which involves adding the components directly to the slow cooker bowl. Check that the slow cooker is clean and the lid is ready to be placed on top immediately after the ingredients are combined.

Instructions

Preparation and Assembly

1. 1Prepare the Ingredients
   Place the thinly sliced flank steak into the bowl of the slow cooker. Ensure the meat is spread out slightly to allow even cooking during the process.
   Look for The meat should be thinly sliced against the grain.
   Tip Slicing the steak while it is slightly frozen makes it much easier to achieve uniform thin strips.

At the end of this phase, the flank steak is neatly arranged in the slow cooker with the cornstarch, garlic, and soy sauce distributed over it. The mixture is ready to be covered and set to cook. Ensure the countertop is clean and the slow cooker is securely plugged in before moving to the cooking phase.

Slow Cooking

2. 2Season and Cook
   Sprinkle the cornstarch over the beef, then add the minced garlic and pour the dark soy sauce over the top. Gently toss the ingredients inside the slow cooker to coat the meat evenly. Cover and cook on low for 4 hours until the beef is tender and reaches an internal temperature of 145°F (63°C). Let the meat rest at least 3 minutes before serving.
   Look for The sauce should become thick and glossy, coating the beef thoroughly.
   Safe temperature 145°F (63°C) internal temperature (steaks, chops and roasts)
   Tip Do not skip the cornstarch, as it is essential for thickening the soy sauce into a rich, sticky glaze.

After four hours of low-heat cooking, the beef should be thoroughly tender and the sauce should have transitioned from a thin liquid into a rich, dark, and glossy coating.

The kitchen should smell savory and aromatic. Before proceeding, verify the beef is cooked through to the required temperature and the sauce consistency is to your preference.

Resting and Serving

3. 3Rest and Serve
   Once the cooking time is complete, allow the beef to rest in the slow cooker for 5 minutes before serving. This resting period ensures the juices redistribute through the meat, resulting in a more tender texture.
   Look for The beef should be dark, glossy, and very tender to the touch.
   Tip Serve immediately while hot for the best flavor and texture experience.

Once the cooking cycle concludes, the dish is allowed to rest for five minutes. The final product should be steaming, fragrant, and have a uniform, sticky glaze covering the meat. Check that the sauce is not excessively watery; if it is, a brief period of high-heat evaporation can be used to achieve the desired thickness before final service.

Common mistakes

A common mistake is slicing the beef with the grain rather than against it, which leads to a chewy texture regardless of the cooking time. Another error is neglecting to toss the cornstarch thoroughly with the meat, which can result in clumpy sauce or uneven thickening.

Ensure that the garlic is minced finely so it distributes its flavor throughout the entire dish rather than leaving large, unpalatable chunks. Finally, avoid opening the slow cooker lid too frequently, as this releases heat and moisture, significantly increasing the required cooking time.

How to tell it’s done

The Mongolian beef is done when the flank steak is exceptionally tender and easily pulls apart with a fork. The internal temperature must reach at least 145°F (63°C) for food safety.

The sauce should have reduced into a thick, glossy, and dark glaze that clings to the beef strips. If the meat feels tough or rubbery, it may need more time in the slow cooker, as the connective tissue requires sufficient heat and moisture to break down completely.

• Steaks, chops and roasts: 145°F (63°C) in the thickest part, then a 3-minute rest