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5 from 9 votes

Vegan Lemon Chicken

Check out how you can turn king oyster mushrooms into a crispy vegan chicken drizzled in a mouthwatering tangy lemon sauce. The mushroom is prepared in a way where you can cut into a cutlet shape, then fried until crispy for that perfect crunch!
Prep Time30 mins
Cook Time35 mins
Total Time1 hr 5 mins
Course: Appetizer, Main Course, Side Dish
Cuisine: Asian, Chinese
Keyword: King oyster mushrooms
Servings: 2
Author: woonheng


  • 300 g [10.5oz] King oyster mushrooms
  • 1 cup crispy tempura batter mix used Kikkoman
  • salt
  • water
  • neutral oil for frying


Lemon sauce

  • cup water
  • 1 tablespoon lemon juice plus more to taste
  • 2 tablespoon maple syrup plus more to taste
  • 1 tablespoon sugar
  • 2 teaspoons vinegar rice or distilled
  • 2 teaspoons cornstarch
  • 2 lemon slices
  • zest from 1 lemon


  • To prepare the mushrooms, clean them with a brush or paper towel to remove debris.
  • Prepare a bowl with ice water and set it aside. Then, fill a wok or large skillet with water with ¼ - ½ teaspoon of salt, and bring it to a boil. Cook the mushrooms for about 10 minutes. The mushrooms should have a glossy outer layer once cooked. Remove and soak it in the ice water bath to stop the cooking.
  • Before cutting the mushrooms, pat dry with a cloth or paper towel to remove moisture. Give them a gentle squeeze if needed.
  • Next, prepare the marinade by combining soy sauce, vegan oyster sauce, and pepper in a large shallow plate or baking pan.
  • To cut the mushroom into a cutlet shape, place it on a sturdy work surface. Using a sharp knife, make a slit from the cap to the stem. Slice it in a spiral motion like how you peel an apple to get a 1cm thick piece. Then, gently score both sides so they better absorb the sauce.
  • Transfer mushrooms cutlet to the marinade, then rub both sides generously with the liquid. Marinate for 15-20 minutes.
  • Meanwhile, whisk together tempura batter mix with water until no large lumps appear.
  • Now, fill a large wok with 5-6 cups of oil and turn on the heat. Once the oil is heated to about 350F, dredge a mushroom cutlet in the batter and slowly slide it into the oil. Fry both sides until golden brown, about 8-10 minutes, with a flip if necessary. Remove and transfer to a drain rack to cool down a little before cutting. The drain rack will keep it crispy while you make the sauce.
  • For other ways to cook the mushroom cutlet, please refer to the '3 ways to cook the mushroom' section.
  • To make the lemon sauce, whisk together the sauce ingredients in a bowl (except lemon slices) until the sugar has dissolved. Pour the sauce in a heated small skillet and bring it to a boil. Once the sauce starts to simmer, add in the lemon slices and continue to cook the sauce until thickened. The sauce will start to thicken as soon as you see large bubbles. Turn off the heat and spoon this sauce over the cut mushrooms cutlet. Serve warm with rice or as-is.



  • Place the batter in the fridge to keep it cold while you fry the mushrooms cutlet, especially when you are frying in batches.
  • Adjust the sweetness and tang of the lemon sauce by adjusting the maple syrup and lemon juice accordingly.