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    Home » Course » Dinner

    Crockpot Mongolian Beef

    Published Jun 20, 2023 | Updated Jun 20, 2023 | By Laura

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    Tender, flavorful and delicious, this super easy Crockpot Mongolian Beef is the perfect weeknight set-it-and-forget-it meal!

    A dinner plate with fried rice, veggies and Mongolian beef.

    Forget expensive take-out! If you’re looking for a minimal effort dinner that the family will love in the comfort of your own home, look no further than this incredible dish! Flank steak, cut against the grain and slow-cooked in a savory sweet sauce, comes out incredibly juicy and flavorful!

    This was the 3rd recipe I shared on Dinner in 321, and I still get messages from families saying how much they love it. If you haven’t tried this dish, it’s a must! Cooking really doesn’t get much easier than this meal!

    Table of Contents

    • What You’ll Need
    • Tools You’ll Need
    • Why You’ll like this Recipe
    • How to Make this Recipe
    • Tips and Substitutions
    • Storage
    • Frequently Asked Questions
    • More Recipes Like This 
    • Crockpot Mongolian Beef
      • Ingredients 1x2x3x4x5x
      • Instructions
      • Video
      • Nutrition

    What You’ll Need

    Ingredient Amounts Listed in the Recipe Card Below

    • Flank Steak
    • Cornstarch
    • Olive Oil
    • Fresh Garlic
    • Reduced-Sodium Soy Sauce
    • Brown Sugar or Brown Sugar Substitute
    • Shredded Carrots
    • Optional: Green Onions and Sesame Seeds
    Ingredients to make Mongolian beef in the crockpot.

    Tools You’ll Need

    • 6-8 Quart Crockpot
    • Ziploc Bag
    • Silicone Tongs

    Why You’ll like this Recipe

    • It takes less than 10 minutes to throw together before cooking!
    • It’s cheaper and yummier than take-out!
    • It’s the perfect meal to come home to after a long day!
    • The beef is melt in your mouth tender and DELICIOUS!

    How to Make this Recipe

    1. Cut steak into ½-inch strips against the grain.
    Slicing flank steak against the grain.
    1. In a Ziploc bag, add steak and cornstarch. Close and shake to coat. 
    Shaking flank steak in cornstarch in a plastic bag.
    1. Add olive oil, garlic, soy sauce, water, brown sugar substitute or brown sugar, and carrots to slow cooker and stir.
    Adding carrots to a crockpot.
    1. Add flank steak and stir until coated. 
    Coating flank steak in sauce in a crockpot.
    1. Cook on high 4-5 hours or on low 6-7 hours or until tender. Garnish with green onions and sesame seeds, if desired. Serve over rice, zoodles or noodles!
    A completed cooked flank steak in a crockpot.

    Tips and Substitutions

    • I recommend using low-sodium or reduced sodium soy sauce to ensure the recipe doesn’t taste too salty or too high in sodium. Coconut Aminos can also be used.
    • Freezing the flank steak for 15 minutes will make it much easier to slice against the grain.
    • If you want to add heat, you can add crushed red pepper flakes, sriracha, hot sauce or chili oil.
    • Brown sugar or brown sugar substitute both work in this dish.
    • This dish can be substituted with sliced or cubed chicken or pork tenderloin.

    Storage

    • After the beef has cooled completely, store leftovers in an air-tight container in the refrigerator up to 3-4 days.
    • Freeze leftovers in an air-tight, freezer-safe container up to 4 months. Thaw in the freezer overnight before reheating.

    Frequently Asked Questions

    • What goes with Crockpot Mongolian Beef?
      • Our family loves having fried rice, hibachi vegetables or sautéed broccoli and mushrooms with this meal. It’s also excellent with steamed rice, noodles or zoodles.
    • Can another cut of meat be used instead of flank steak?
      • Absolutely! I prefer flank steak for this dish, but you can also use hanger steak, skirt steak or sirloin steak.
    • Where did Mongolian Beef originate?
      • The exact origin is unclear, but is believed to be inspired by Mongolian barbecue. It is commonly served in Chinese-American restaurants.
    • Can garlic powder be used instead of fresh garlic?
      • Of course! You can use ½-1 teaspoon garlic powder in place of fresh garlic.
    • Can this be made on the stovetop?
      • Yes! Working in batches, sear ¼-inch sliced and cornstarch coated beef on medium-high in oil 2-3 per side. Remove from the pan, then add the remaining sauce ingredients on medium high. Simmer 2-3 minutes then return the beef to the skillet.
    • Can this be made in an instant pot?
      • Yes! Just sauté the flank steak on high before adding the sauce ingredients and cook on manual for 10 minutes. Carefully quick release pressure, stir and serve.
    • Is this gluten-free?
      • Other than the soy sauce, this recipe is gluten-free. Choose one of the gluten-free soy sauce varieties/alternatives to make it a gluten free dish.

    More Recipes Like This 

    • Crockpot Korean Beef
    • Crockpot Honey Garlic Chicken
    • Crockpot Garlic and Herb Pork Roast
    • Balsamic Flank Steak
    A dinner plate with fried rice, veggies and Mongolian beef.
    Print Recipe Rate this Recipe Pin Recipe
    4.75 from 24 votes

    Crockpot Mongolian Beef

    Tender, flavorful and delicious, this super easy Crockpot Mongolian Beef is the perfect weeknight set-it-and-forget-it meal!
    Prep Time30 minutes mins
    Cook Time7 hours hrs
    Total Time7 hours hrs 30 minutes mins
    Course: Main Course
    Cuisine: American
    Keyword: beef, crockpot
    Servings: 4 Servings
    Calories: 357kcal
    Prevent your screen from going dark

    Ingredients
     

    • 1 ½-2 lb flank steak
    • ¼ cup cornstarch
    • 2 tablespoon olive oil
    • 2-3 garlic cloves minced
    • ½ cup reduced-sodium soy sauce
    • ¼ cup water
    • ⅔ cup brown sugar or brown sugar substitute
    • 1 cup shredded carrots
    • Garnish: green onions

    Instructions

    • Cut steak ½-inch strips. In a Ziploc bag, add steak and cornstarch. Shake to coat. 
    • Add olive oil, garlic, soy sauce, water, brown sugar substitute or brown sugar, and carrots to slow cooker and stir. Add flank steak and stir until coated. 
    • Cook on high 4-5 hours or on low 6-7 hours or until tender. 
    • Serve over rice, zoodles or noodles!

    Video

    Nutrition

    Calories: 357kcal | Carbohydrates: 12g | Protein: 40g | Fat: 16g | Saturated Fat: 5g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 8g | Cholesterol: 102mg | Sodium: 1264mg | Potassium: 774mg | Fiber: 1g | Sugar: 2g | Vitamin A: 4413IU | Vitamin C: 1mg | Calcium: 59mg | Iron: 3mg
    Tried this recipe?Mention @dinnerin321 or tag #dinnerin321!
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    Filed Under: beef, Crockpot Meals, Dinner

    Laura

    About Laura

    Taught by some of the best, cooking and entertaining has always been my favorite hobby. Food is my love language! The conception of Dinner in 321 came from my family talks that sharing our dinners would help others learn new skills, tasty recipes, and make cooking fun! Read more...

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      Recipe Rating




    1. Chris Banks

      February 05, 2023 at 9:47 pm

      How much brown sugar do you use in this recipe? I don’t see it on the list of ingredients. Thanks!!

      Reply
      • Laura Ashley

        February 06, 2023 at 12:49 pm

        Thanks, Chris! I just fixed it. It’s 2/3 cup brown sugar or brown sugar substitute. I hope you love it!

    2. Lauri

      June 22, 2023 at 10:26 pm

      I made this, my husband and I thought it was really good. The meat was done in my slow cooker in 3 1/2 hours on low.

      Reply
      • Laura Ashley

        June 26, 2023 at 4:39 pm

        That is WONDERFUL! I’m so happy you made it and it was such a hit! Thank you!

    3. Jewels

      July 21, 2023 at 11:39 pm

      5 stars
      I made this and it was delicious! Would love more flank steak recipes. Thank you!

      Reply
      • Laura Ashley

        July 24, 2023 at 1:56 pm

        That's WONDERFUL, Julie! Thank you so much! I'm so happy you made it and liked it so much. I will work on more flank steak recipes for sure!

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    Welcome to my kitchen! I'm Laura Ashley, and I'm excited you're here! As a registered dietitian and diabetes educator, I love cooking all kinds of food and trying new restaurants. Food is my love language! Here at Dinner in 3, 2, 1, I serve up delicious and nutritious recipes you and your family will love.

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