Chicken and shrimp stir fry with tender chicken, juicy shrimp, and shiitake mushrooms in a savory oyster sauce. A tested, one-pan, protein-rich dinner.
Hold your knife at a 45-degree angle and slice the chicken against the grain into pieces about ⅛-inch thick.
Transfer the chicken to a medium bowl. Add the soy sauce, water, sugar, baking soda, salt, 1 tablespoon olive oil, and pepper. Mix well. Add the starch and toss again until evenly coated. Refrigerate for 15 minutes.
Prepare the shrimp
Pat the shrimp dry. Using a small paring knife, make a shallow slit along the back of each shrimp without cutting all the way through. This helps the shrimp cook evenly and curl open as it cooks.
Transfer the shrimp to a bowl and toss with the starch until lightly coated.
Prepare the aromatics and mushrooms
Finely mince the garlic and ginger. Cut the scallions into 2-inch sections, keeping the white and green parts separate. Thinly slice the shiitake mushroom caps.
Make the sauce
In a small bowl, whisk together the oyster sauce, soy sauce, rice vinegar, stock, sesame oil, starch, and cooking wine, if using. Stir until the starch is fully dissolved.
Sear the chicken
Preheat a 12-inch sauté pan over medium heat until hot. You should feel the heat when holding your hand 2 to 3 inches above the surface.
Add 1 tablespoon avocado oil and swirl to coat the pan. Add the chicken, increase the heat to medium-high, and quickly spread the pieces into a single layer.
Sear without moving for 2 to 3 minutes, until golden underneath. Flip and cook the other side for 1 to 2 minutes, or until the chicken is just cooked through and golden on the outside. Transfer to a plate.
Sear the shrimp
Add another tablespoon of avocado oil to the pan. When the oil shimmers but is not smoking, add the shrimp one at a time and arrange them in a single layer.
Sear over medium heat for a little over 1 minute. Flip and cook for another 30 to 60 seconds, until lightly golden and almost cooked through. Transfer to the plate with the chicken.
Cook the aromatics and mushrooms
While the pan is still hot, add the remaining 2 tablespoons of avocado oil. Add the garlic, ginger, and white scallion parts. Sauté over medium heat for about 10 seconds, until fragrant. You should hear a gentle sizzle.
Add the shiitake mushrooms and sauté for 1 minute. Deglaze the pan with 1½ tablespoons chicken stock. Continue stir-frying for another minute, using a wooden spoon to scrape up any browned bits from the bottom of the pan.
Finish the stir-fry
Return the chicken and shrimp to the pan and add the green scallion parts. Increase the heat to medium-high.
Stir the sauce again to redistribute the starch, then pour it into the pan. Toss for about 1 minute, until the sauce thickens and evenly coats the chicken and shrimp. Turn off the heat.
Serve
Transfer to a large serving bowl and finish with a light sprinkle of white pepper. Serve hot or warm with steamed rice.
Notes
Pan: Use a 12-inch nonstick sauté pan, a well-seasoned wok, or a well-oiled cast iron skillet. Shrimp can stick easily, so make sure the cooking surface is properly greased.
Frozen shrimp: Thaw the shrimp completely and pat them dry. Use 2 teaspoons starch instead of 1½ teaspoons because thawed frozen shrimp tends to hold more surface moisture.
Make-ahead: Slice and velvet (season) the chicken in advance. Store it raw in an airtight container in the refrigerator for up to 2 days. To freeze, arrange the chicken in a flat layer inside a freezer-safe bag and freeze for up to 2 months. Thaw overnight in the refrigerator before cooking.
Storage: Store cooked leftovers in an airtight container in the refrigerator for 3 to 4 days.
Reheating: Microwave on medium power for 1 minute. Stir, then continue heating in 30-second increments until warmed through. You can also briefly sauté the leftovers on the stovetop.