Beef Onion Stir Fry

There’s something about the sizzle of a stir fry that brings everyone running to the kitchen. The aroma of savory beef mingling with the sweetness of caramelized onions is enough to make mouths water. This Beef Onion Stir Fry is one of those recipes that never fails to impress—whether it’s a busy weeknight dinner or a weekend meal when you need something quick yet delicious.
I started making this dish out of necessity—some nights, you just need a meal that comes together in under 30 minutes but still tastes like you spent hours in the kitchen. With simple, wholesome ingredients and a well-balanced sauce, this stir fry delivers big on flavor without requiring an extensive grocery list.
The first time I made it, my family devoured their plates in record time. Even my pickiest eater, who usually shies away from onions, couldn’t resist the rich, umami-packed sauce that coated every bite. The thinly sliced sirloin stays melt-in-your-mouth tender, thanks to the quick cooking method, and the onions add just the right amount of sweetness and crunch.
What I love most about this recipe is its versatility—you can easily swap out the protein, add extra veggies, or tweak the sauce to suit your taste. It’s a foolproof dish that’s bound to become a go-to in your household, just like it has in mine.
Questions I Often Get Asked About This Recipe

Can I use a different cut of beef?
Yes! While sirloin is great for tenderness, flank steak or ribeye also work well. Just be sure to slice the beef thinly against the grain.
Can I make this dish ahead of time?
It’s best enjoyed fresh, but you can prep the sauce and slice the beef in advance for a quicker cook time.
What if I don’t have oyster sauce?
You can substitute it with hoisin sauce for a sweeter twist or simply add more soy sauce with a dash of Worcestershire sauce.
Is this dish spicy?
Not at all! But if you like some heat, add a pinch of red pepper flakes or a drizzle of sriracha.
What You Need to Make Beef Onion Stir Fry

1 lb beef sirloin, sliced thin
1 large onion, sliced
2 tbsp soy sauce
1 tbsp oyster sauce
2 cloves garlic, minced
1 tbsp vegetable oil
1 tsp ginger, minced
Salt and pepper to taste
Green onions for garnish (optional)
How to Make Beef Onion Stir Fry

Prepare the ingredients: Thinly slice the beef and onions. Mince the garlic and ginger.
Heat the oil: In a large pan or wok over medium-high heat, add the vegetable oil.
Cook the beef: Add the sliced beef and cook for 2-3 minutes until browned. Remove from the pan and set aside.
Sauté the aromatics: In the same pan, add the garlic and ginger. Cook for about 30 seconds until fragrant.
Cook the onions: Toss in the sliced onions and stir-fry until they become tender but still slightly crisp.
Add the sauce: Pour in the soy sauce and oyster sauce, stirring to coat the onions.
Return the beef: Add the cooked beef back to the pan, tossing everything together for another minute.
Serve and enjoy: Garnish with green onions and serve over steamed rice or noodles.
Tips for Making the Best Beef Onion Stir Fry

Slice the beef thinly: This ensures it cooks quickly and stays tender.
Use a hot pan: A high heat stir fry keeps everything crisp and prevents the beef from steaming.
Don’t overcook the onions: You want them slightly softened but still with a bit of crunch.
Marinate for extra flavor: If you have time, marinate the beef in soy sauce, ginger, and garlic for 15 minutes before cooking.
Reader Reviews

⭐⭐⭐⭐⭐ “Quick, easy, and full of flavor! This is now a weeknight staple.”
⭐⭐⭐⭐⭐ “Perfect balance of sweet and savory. I added mushrooms, and it turned out amazing!”
⭐⭐⭐⭐ “Loved the sauce, but I’ll use a little less onion next time.”
⭐⭐⭐⭐ “Really good! I wish I had made extra because my family wanted seconds.”
⭐⭐⭐⭐⭐ “So simple yet packed with flavor. Definitely making this again!”
Printable Recipe

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Beef Onion Stir Fry
A quick and flavorful Beef Onion Stir Fry featuring tender sirloin, sweet onions, and a rich umami sauce. Perfect for busy weeknights when you need a fast, satisfying meal!
Ingredients
- 1 lb beef sirloin, sliced thin
- 1 large onion, sliced
- 2 tbsp soy sauce
- 1 tbsp oyster sauce
- 2 cloves garlic, minced
- 1 tbsp vegetable oil
- 1 tsp ginger, minced
- Salt and pepper to taste
- Green onions for garnish (optional)
Instructions
- Prepare the ingredients: Thinly slice the beef and onions. Mince the garlic and ginger.
- Heat the oil: In a large pan or wok over medium-high heat, add the vegetable oil.
- Cook the beef: Add the sliced beef and cook for 2-3 minutes until browned. Remove from the pan and set aside.
- Sauté the aromatics: In the same pan, add the garlic and ginger. Cook for about 30 seconds until fragrant.
- Cook the onions: Toss in the sliced onions and stir-fry until they become tender but still slightly crisp.
- Add the sauce: Pour in the soy sauce and oyster sauce, stirring to coat the onions.
- Return the beef: Add the cooked beef back to the pan, tossing everything together for another minute.
- Serve and enjoy: Garnish with green onions and serve over steamed rice or noodles.
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