Marinate the beef with soy sauce, salt, garlic powder, and baking powder. Mix well, then add cornstarch and toss by hand until the pieces are craggy. Set aside.
In a bowl, whisk together the orange zest, juice from 1 orange, enough bottled orange juice to make ¾ cup total, soy sauce, rice vinegar, honey, and crushed red pepper. Set aside.
Heat oil to 400°F. Fry the beef in small batches for 3–4 minutes, leaving it untouched for the first minute, until golden and crispy. Drain on a wire rack or paper towels.
Fry vermicelli noodles for 5–10 seconds per side until puffed and crispy. Remove and plate.
Bring the sauce to a boil in a wok. Stir the cornstarch slurry, then slowly whisk it into the sauce until thickened. Add the fried beef and toss to coat.
Serve over the crispy vermicelli noodles or on its own. Enjoy!
