As I stood in my kitchen one busy evening, the faint aroma of garlic and soy sauce wafted through the air, instantly transforming my chaotic day into something a little more serene. This Easy Slow Cooker Mongolian Beef recipe has become my secret weapon for those nights when I want to serve up homemade comfort without the fuss. With minimal prep and a hands-off cooking approach, it’s perfect for anyone seeking a delicious meal on a busy weeknight. The tender flank steak soaks up a blend of sweet and savory flavors, while vibrant carrots and onions add just the right touch of color and crunch. So why let takeout steal the spotlight when you can create this delightful dish at home? Ready to dive into a world of flavor? Let’s get cooking!

Why Choose Slow Cooker Mongolian Beef?

Simplicity at Its Best: With minimal ingredients and easy steps, this recipe suits both novice and experienced cooks.
Irresistible Aroma: The combination of garlic and soy sauce creates a mouthwatering scent that fills your home.
Flavorful Satisfaction: The tender flank steak soaked in a sweet and savory sauce offers a taste that no takeout can match.
Versatile Customization: You can easily add your favorite vegetables, like bell peppers or broccoli, to suit your taste.
Time-Saving Wonder: Just set it and forget it! Perfect for busy weeknights when you need a hearty meal without the hassle.

Pair it with our delicious Greek Lemon Rice for a complete meal!

Easy Slow Cooker Mongolian Beef Ingredients

For the Beef
• Flank Steak – Cut into strips for tenderness; core protein. Substitute sirloin for a similar texture; avoid tougher cuts like stew meat.
For the Sauce
• Cornstarch – Coats the meat for a thicker sauce and helps tenderize. Arrowroot powder or tapioca flour can be used if cornstarch is unavailable.
• Water – In the sauce, helps distribute flavor; essential for cooking. No substitutes needed.
• Low-Sodium Soy Sauce – Adds saltiness and depth; flavor base of the dish. Use regular soy sauce for a stronger flavor.
• Avocado Oil – A neutral oil choice for cooking; adds a mild flavor. Can be substituted with canola or vegetable oil.
• Garlic – Freshly minced adds aromatic flavor to the sauce. Use garlic powder as a last resort, but fresh is best.
• Brown Sugar – Provides sweetness to balance the saltiness. Maple syrup or honey can provide a similar effect; powdered sugar may not work.
• Red Pepper Flakes – Adds heat; adjust according to spice preference. Omit for a milder dish or substitute with sriracha.
For the Veggies
• Carrots – For sweetness and color; nutrients. Substitute with bell peppers for different texture.
• Onion – Adds sweetness and depth of flavor; key aromatic. Shallots can serve as a mild substitute.
For Garnish
• Sesame Seeds – For garnish; adds crunch and aesthetic appeal. Omit if unavailable; consider crushed peanuts for a new texture.
• Green Onions – For garnish; brightens the dish. Use chives as an alternative.

Step‑by‑Step Instructions for Easy Slow Cooker Mongolian Beef

Step 1: Prepare the Sauce
In a medium bowl, whisk together 1 cup of water, ¾ cup low-sodium soy sauce, ½ cup brown sugar, 2 tablespoons of avocado oil, 1 teaspoon red pepper flakes, and 4 cloves of minced garlic until well combined. This sauce will become the flavorful base of your Easy Slow Cooker Mongolian Beef, so ensure it’s smooth with no lumps before proceeding.

Step 2: Coat the Meat
Take 1 pound of flank steak cut into strips and place it in a large zipper bag. Add ¼ cup of cornstarch to the bag, seal it tightly, and shake vigorously until the meat is fully coated. This coating will help thicken the sauce and keep the beef tender as it cooks, so take your time to ensure even coverage.

Step 3: Arrange in Cooker
Open your slow cooker and layer the coated steak strips at the bottom. Next, add 1 diced onion and 2 shredded carrots on top of the steak. This arrangement allows the vegetables to infuse their sweetness into the beef as it cooks, creating that delicious depth of flavor throughout the Easy Slow Cooker Mongolian Beef.

Step 4: Combine and Cook
Pour the prepared sauce over the meat and veggies in the slow cooker, making sure everything is well coated. Stir gently to combine and then set the slow cooker to high for 2-3 hours or low for 4-5 hours. You’ll know it’s ready when the beef reaches an internal temperature of 145°F, and the sauce thickens beautifully.

Step 5: Serve
Once cooked, give the Easy Slow Cooker Mongolian Beef a gentle stir before serving. Garnish with sesame seeds and sliced green onions to add a touch of brightness and crunch. This dish is best served over fluffy rice, allowing you to soak up all those delicious flavors in each bite.

Easy Slow Cooker Mongolian Beef Variations

Feel free to personalize this recipe and create your own mouthwatering twist, making it as unique as your taste buds!

Vegetable Additions: Toss in fresh broccoli, green beans, or bell peppers during the last hour of cooking for a splash of color and nutrition.
Spicy Kick: Replace red pepper flakes with sriracha for added heat or increase the flakes for a fiery twist; your taste buds will thank you!
Dairy-Free: Use coconut aminos instead of soy sauce for a tasty gluten-free and dairy-free alternative that still maintains great flavor.
Sweet Alternatives: Consider using honey or maple syrup instead of brown sugar to add a delightful sweetness that enhances the savory notes beautifully.
Asian Fusion: Swap flank steak with tender chicken strips for a lighter protein option; perfect if you want to switch it up and enjoy a delightful twist on the classic!
Texture Twist: Add crushed peanuts or cashews as a garnish for a crunchy texture that pairs perfectly with the dish’s rich sauce.
Flavor Expansion: Mix in some fresh herbs like cilantro or basil right before serving, welcoming a refreshing pop of flavor.
Meal Prep Magic: Double the recipe and enjoy half over fluffy rice one night, then pair the leftovers with our delicious Greek Lemon Rice for a vibrant meal the next day!

Come, explore your creativity with this Easy Slow Cooker Mongolian Beef, and elevate your dining experience with your own unique flair!

What to Serve with Easy Slow Cooker Mongolian Beef

Transform your weeknight dinner into a complete culinary experience with these delicious pairings that enhance the flavors of your tender Mongolian beef.

Fluffy Jasmine Rice: This fragrant rice soaks up the savory sauce beautifully, creating a comforting base for each bite of beef.
Steamed Broccoli: This vibrant green vegetable adds a fresh crunch and balances the rich flavors of the dish, making every mouthful delightful.
Crispy Spring Rolls: Their crispy exterior and savory filling offer a wonderful contrast, making for a playful textural experience alongside your beef.
Garlic Green Beans: Sautéed with aromatics, these beans add a splash of color and bring bursts of garlicky flavor that complement the main dish.
Creamy Mashed Potatoes: The smooth, buttery texture pairs excellently with the sauce, fulfilling that soul-soothing comfort food craving.
Sweet and Tangy Cucumber Salad: Refreshing and crunchy, this salad provides a cool contrast that brightens up the plate, bringing a wonderful balance to the meal.
Chilled Coconut Milk Dessert: A light, creamy dessert that cools the palate after the rich Mongolian beef, rounding off the meal with a sweet touch.

Make Ahead Options

These Easy Slow Cooker Mongolian Beef is perfect for meal prep enthusiasts! You can prep the sauce (whisk together the water, soy sauce, brown sugar, avocado oil, red pepper flakes, and minced garlic) and store it in the refrigerator for up to 3 days in advance. Additionally, coat the flank steak with cornstarch and store it separately, ensuring it stays fresh. When you’re ready to cook, simply add the coated steak, diced onions, and shredded carrots to the slow cooker, pour in the sauce, and set it to cook. This way, you’ll have a delicious, homemade meal ready with minimal effort during your busy weeknights!

How to Store and Freeze Easy Slow Cooker Mongolian Beef

Fridge: Store leftovers in an airtight container for up to 3 days. Always let the dish cool completely before covering to prevent moisture buildup.

Freezer: For longer storage, freeze in a sealed container for up to 3 months. Thaw overnight in the fridge before reheating for best results.

Reheating: When ready to enjoy again, reheat on low in a saucepan or microwave. Add a splash of water to restore the sauce consistency of your Easy Slow Cooker Mongolian Beef.

Serving Tip: For a quick meal, serve leftovers over fresh rice or noodles to create a delightful dish in minutes!

Expert Tips for Easy Slow Cooker Mongolian Beef

Pre-Browning Bonus: Sear the flank steak in a hot skillet for 2-3 minutes per side. This enhances the flavor and adds depth to your Easy Slow Cooker Mongolian Beef.
Cutting Technique: Always cut the steak against the grain for maximum tenderness. This simple technique makes all the difference in texture!
Adjust Sauce Thickness: If the sauce thickens more than you like during storage, simply add a splash of water when reheating to restore its consistency.
Vegetable Timing: If adding extra veggies like broccoli or bell peppers, toss them into the slow cooker in the last hour for the best texture.
Flavor Experimentation: Don’t be afraid to play with ingredient quantities! Tailor the sweetness or spice level to your personal taste, ensuring it’s just right for your dinner table.
Storage Solutions: Keep leftovers in an airtight container for up to 3 days, and reheat gently to maintain flavors and texture in your Easy Slow Cooker Mongolian Beef.

Easy Slow Cooker Mongolian Beef Recipe FAQs

What type of flank steak should I use?
Absolutely! For this dish, look for flank steak that is bright red with good marbling. Avoid any cuts with dark spots or excess fat. If flank steak is unavailable, sirloin is a suitable substitute that maintains a similar texture.

How do I store leftovers of Easy Slow Cooker Mongolian Beef?
Leftovers should be stored in an airtight container and can last in the fridge for up to 3 days. Make sure to let the dish cool completely before sealing it to prevent condensation, which could make the sauce watery.

Can I freeze Easy Slow Cooker Mongolian Beef, and if so, how?
Yes, you can freeze it! Pour the cooled dish into a sealed container and freeze for up to 3 months. To ensure the best quality, let it thaw overnight in the fridge before reheating. Reheat gently in a saucepan or microwave, adding a splash of water if the sauce has thickened.

What should I do if the sauce is too thick after cooking?
Very! If your sauce thickens too much, simply add a small splash of water or broth while reheating, stirring gently until it reaches your desired consistency. This will help restore that delicious sauciness to your Easy Slow Cooker Mongolian Beef.

Are there any dietary considerations for this recipe?
Yes, indeed! This recipe contains soy sauce, which may not be suitable for those with soy allergies. If you’re looking for a gluten-free option, use tamari or coconut aminos instead of soy sauce. Additionally, feel free to adjust the spice level by reducing or omitting red pepper flakes if you’re sensitive to heat.