Crispy Beef Stir-Fry with Peppers and Onions (Crispy, Sweet, and Spicy)

This Crispy Beef Stir-Fry is your answer to takeout cravings—without the delivery fee. Think of it as a mashup between Mongolian Beef and Crispy Chili Beef: thin strips of beef, lightly fried until crispy, then tossed in a sticky-sweet garlic soy glaze with colorful bell peppers and onions.

It’s bold, saucy, and hits all the right flavor notes: sweet, savory, tangy, and (if you like) a little spicy. Pair it with steamed rice or noodles, and you’ve got a crowd-pleasing dinner in under 30 minutes.

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Why I Love This Recipe

There’s something wildly satisfying about crispy beef. When it’s paired with caramelized onions, crunchy bell peppers, and a rich sauce that clings to every bite, it becomes next-level. I love that this recipe is simple to make but feels like something you’d order from a favorite restaurant.

The cornstarch crust gives it a beautiful crunch that holds up even after it hits the sauce—and that glossy stir-fry glaze? Addictive.

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Ingredients

For the Beef:

• 1 lb flank steak or sirloin, thinly sliced
• ¼ cup cornstarch
• Oil for frying

For the Sauce:

• 2 tbsp soy sauce
• 2 tbsp hoisin sauce
• 1 tbsp rice vinegar
• 2 tbsp brown sugar
• 2 cloves garlic, minced
• 1 tsp ginger, minced
• 1 tsp sesame oil
• 1 tbsp chili paste or fresh red chili (optional, for heat)

Stir-Fry Veggies:

• 1 red bell pepper, diced
• ½ onion, chopped
• Sesame seeds, for garnish

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Ingredient Notes & Swaps

• Beef: Flank steak or sirloin are ideal; slice thinly against the grain for tenderness.
• Hoisin Sauce: Adds sweetness and depth—can sub with oyster sauce in a pinch.
• Chili Paste: Optional, but a must if you love that chili beef kick.
• Add-ins: Snow peas, broccoli, or sliced green onions work great too.

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How to Make Crispy Beef Stir-Fry

Step 1: Prep and Coat the Beef

Toss the sliced beef in cornstarch until well-coated. This creates that signature crisp exterior when fried.

Step 2: Fry the Beef

Heat oil in a wok or deep skillet. Fry the beef in batches until browned and crispy. Don’t overcrowd the pan. Remove and let drain on paper towels.

Step 3: Sauté the Aromatics

In another pan or cleaned wok, heat a small amount of oil over medium. Add the minced garlic and ginger and sauté for 30 seconds until fragrant.

Step 4: Stir-Fry the Veggies

Add the bell pepper and onion, and stir-fry for 2–3 minutes until just tender.

Step 5: Make the Sauce

In a bowl, whisk together the soy sauce, hoisin, vinegar, brown sugar, sesame oil, and chili paste if using. Pour it into the skillet with the vegetables and let it simmer until slightly thickened.

Step 6: Toss the Beef

Return the crispy beef to the pan and toss until coated in sauce. Heat through for another minute or so.

Step 7: Garnish and Serve

Sprinkle with sesame seeds and serve immediately with steamed rice or noodles.

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Tips for Success

• Slice the beef thin and against the grain for maximum tenderness.
• Fry in batches so the meat crisps properly—overcrowding cools the oil.
• Don’t skip the cornstarch—it’s what gives the beef its signature crunch.
• Control the heat with more or less chili paste, depending on your spice level.

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What to Serve with Crispy Beef Stir-Fry

This dish is fantastic on its own, but here’s how to turn it into a full meal:

• Sheet Pan Quesadillas – great for fusion dinners or feeding a hungry crowd
• Dorito Casserole – for a bold-flavored weeknight combo
• Beer Cheese Dip – serve as an appetizer before the main event
• Tomato Skillet with Okra and Sausage – hearty, veggie-packed side
• Walking Taco Bar – pair for a casual dinner party buffet

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Storage & Reheating

• Refrigerator: Store leftovers in an airtight container for up to 3 days.
• Reheat: Warm in a hot skillet to revive some crispiness, or microwave with a splash of water.
• Freezer: Not recommended once the sauce is added—best enjoyed fresh.

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More Recipes You’ll Love

• Sheet Pan Quesadillas
• Dorito Casserole
• Beer Cheese Dip
• Tomato Skillet with Okra and Sausage
• Walking Taco Bar

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Final Thoughts

This Crispy Beef Stir-Fry with Peppers and Onions brings that crave-worthy takeout flavor right to your kitchen—no wok skills required. It’s crispy, saucy, and hits the spot every time.

👇 Let us know if you tried it with extra heat or added your own veggie twist! Tag @chefmaniac and share your sizzling stir-fry masterpiece!