Go Back
A close-up of a bowl filled with savory beef black pepper udon noodles, garnished with fresh green onions and sesame seeds.
Daniel

Spicy Beef Black Pepper Udon Stir-Fry

A robust and savory stir-fry combining tender beef strips with chewy udon noodles, coated in an aromatic black pepper sauce. This dish is quick to prepare and packed with umami flavor, perfect for a weeknight meal.
Print Recipe Pin Recipe
Prep Time 20 minutes
Cook Time 15 minutes
Total Time 35 minutes
Servings: 4 servings
Course: Main Course
Cuisine: Asian, Fusion, Japanese
Calories: 450
Ingredients Equipment Method Notes

Ingredients
  

For the Beef Marinade
  • 1 lb beef flank steak or sirloin thinly sliced against the grain
  • 1 tbsp soy sauce
  • 1 tsp rice vinegar
  • 1 tsp sesame oil
  • 1 tbsp cornstarch
  • 1/2 tsp black pepper freshly ground
For the Black Pepper Sauce
  • 3 tbsp soy sauce
  • 1 tbsp oyster sauce
  • 1 tbsp rice vinegar
  • 1 tbsp granulated sugar
  • 1 tbsp black pepper freshly ground, or more to taste
  • 1/2 cup water or beef broth
  • 1 tsp cornstarch
For the Stir-Fry
  • 2 tbsp vegetable oil or canola/peanut oil
  • 4 cloves garlic minced
  • 1 tbsp fresh ginger grated
  • 1/2 yellow onion thinly sliced
  • 1 red bell pepper thinly sliced
  • 16 oz pre-cooked udon noodles fresh or frozen (thawed)
  • 2 green onions chopped, for garnish
  • 1 tsp toasted sesame seeds for garnish
  • 1/2 tsp red chili flakes optional, for extra heat

Equipment

  • Large Wok or Skillet
  • Mixing Bowls
  • Whisk
  • Measuring Spoons and Cups

Method
 

  1. In a medium bowl, combine the thinly sliced beef with 1 tbsp soy sauce, 1 tsp rice vinegar, 1 tsp sesame oil, 1 tbsp cornstarch, and 1/2 tsp freshly ground black pepper. Mix well to coat the beef evenly. Set aside to marinate for at least 15 minutes while you prepare other ingredients.
  2. In a small bowl, whisk together 3 tbsp soy sauce, 1 tbsp oyster sauce, 1 tbsp rice vinegar, 1 tbsp granulated sugar, 1 tbsp freshly ground black pepper, 1/2 cup water (or beef broth), and 1 tsp cornstarch until smooth. Set aside.
  3. If using frozen udon, blanch them in boiling water for 1-2 minutes until separated and tender, then drain and rinse with cold water to prevent sticking. If using fresh vacuum-sealed udon, follow package instructions (usually just a quick rinse or quick blanch). Set aside.
  4. Heat 1 tablespoon of vegetable oil in a large wok or skillet over high heat until shimmering. Add the marinated beef in a single layer and stir-fry for 2-3 minutes until browned and cooked through. Do not overcrowd the pan; cook in batches if necessary. Remove the beef from the wok and set aside.
  5. Add the remaining 1 tablespoon of vegetable oil to the wok. Add minced garlic, grated ginger, and sliced yellow onion. Stir-fry for 1-2 minutes until fragrant. Add the sliced red bell pepper and continue to stir-fry for 2-3 minutes until the vegetables are slightly tender-crisp.
  6. Return the cooked beef to the wok with the vegetables. Add the prepared udon noodles. Give the black pepper sauce a quick whisk (as cornstarch can settle) and pour it over the noodles, beef, and vegetables.
  7. Toss everything together for 2-3 minutes, allowing the sauce to thicken and coat all ingredients evenly. Ensure the udon noodles are heated through.
  8. Remove from heat. Garnish with chopped green onions, toasted sesame seeds, and red chili flakes (if using). Serve immediately.

Notes

For a stronger black pepper kick, you can toast whole peppercorns lightly in a dry pan before grinding them. Feel free to add other vegetables like mushrooms, carrots, or broccoli florets; add them with the bell pepper to ensure they cook properly. Fresh udon noodles are often found in the refrigerated or Asian aisle of supermarkets and provide the best texture.