Easy Slow Cooker Mongolian Beef (P.F. Chang Style)

The first time I made this Slow Cooker Mongolian Beef, my kids gave me that look. You know, the “what is this?” look that only kids can master. But as soon as they took their first bites, they were hooked. My youngest even declared, “Mom, this tastes like restaurant food!” Now, it’s one of their most requested dinners, and I love how easy it is to whip up.

Mongolian beef from the slow cooker is one of those dinners that makes the whole house smell like a restaurant for two hours and requires about twenty minutes of actual work. Thin slices of steak get tossed in cornstarch, seared quickly in a skillet, then transferred to the slow cooker with a sauce of soy sauce, brown sugar, garlic, and ginger. Two hours on high. Done.

The sear before the slow cooker matters — don’t skip it. It builds a crust on the outside of the beef that holds up through the braise and gives you actual texture rather than soft, flabby strips. Five minutes in a hot skillet is all it takes.

Ingredients

Steak (1 pound, thinly sliced): Flank steak or flank-style beef is the traditional choice for Mongolian beef — it’s lean, slices cleanly, and holds up through the slow cook without becoming mushy. Sirloin also works well. Freeze the steak for 15-20 minutes before slicing to make thin cuts easier.

Cornstarch (¼ cup): Two jobs: coats the beef for a better sear, and helps thicken the sauce as the beef cooks. Don’t skip it. Coat the beef just before searing — if it sits too long the cornstarch gets gummy.

Low sodium soy sauce (½ cup): Low sodium is specified for a reason — regular soy sauce at this quantity would make the dish extremely salty. The sodium lands at around 1,216mg per serving with low sodium; regular soy sauce would push that significantly higher.

Brown sugar (½ cup): This is the sweet element that balances the soy sauce and creates the glossy, sticky sauce Mongolian beef is known for. Light or dark brown sugar both work — dark brown gives a slightly more molasses-forward flavor.

Ground ginger (½ teaspoon): Ground ginger is convenient and works well here. Fresh ginger (about 1 teaspoon grated) gives a brighter, more assertive ginger flavor if you want to upgrade.

Minced garlic (1 tablespoon): The jarred minced garlic-in-water variety works perfectly. Fresh minced garlic is also fine — same quantity.

Green onions: Added in the last 10 minutes of cooking rather than at the beginning so they stay slightly crisp rather than completely wilted.

How to Make It

Start with the beef. If you have time, stick it in the freezer for 15-20 minutes before you start — it makes slicing thin strips significantly easier. Once it’s sliced, toss it in the cornstarch until all the pieces are evenly coated.

Get a skillet hot over medium-high heat with 2 tablespoons of vegetable oil. Add the beef in a single layer — don’t pile it in or it’ll steam instead of sear. Let it sit for a couple of minutes until it’s lightly browned, then stir and cook another minute or two. You’re not trying to cook it through here, just building some color and crust. This step takes about 5 minutes total.

While the beef is searing, whisk together the remaining tablespoon of oil, soy sauce, brown sugar, ginger, and garlic in a bowl. It’ll look like a lot of sauce — that’s correct.

Transfer the seared beef to the slow cooker and pour the sauce over it. Set it to high for 2 hours or low for 4 hours. Leave it alone.

When the time is up, add the sliced green onions and let them cook for another 10 minutes with the lid on. Then serve over rice or noodles. The sauce will have thickened into a glossy, sticky coating on the beef.

FAQs

When to Serve This Dish

This dish is perfect for busy weeknights when you want something hearty and delicious with minimal effort. It also shines as a crowd-pleaser for family dinners or even a casual dinner party. Pair it with a side of steamed broccoli for a complete meal.

How to Store Leftovers

Store leftovers in an airtight container in the refrigerator for up to 3 days. Reheat in a skillet over low heat — add a splash of water if the sauce has thickened too much during storage. For longer storage, freeze individual portions and thaw overnight in the refrigerator before reheating.

This recipe is a winner because it nails the balance of flavors—savory, sweet, garlicky, and slightly spicy from the ginger. The slow cooker does all the heavy lifting, turning the steak into melt-in-your-mouth perfection. Plus, it’s versatile enough to pair with your favorite sides, making it a go-to meal that never gets old.

Here are some more amazing Slow Cooker dinner recipes to try!