Can I make hot and sour soup without tofu?
Yes. Replace tofu with shredded chicken, cooked shrimp, or additional mushrooms and vegetables for similar texture and substance.
What's the difference between black vinegar and regular vinegar?
Chinese black vinegar has a deeper, slightly smoky flavor compared to white vinegar or rice vinegar. White vinegar can substitute in equal amounts, but reduce slightly as it's sharper.
Can I prepare hot and sour soup ahead of time?
Yes. Make the broth up to 2 days ahead; store in an airtight container in the fridge. Add tofu, mushrooms, and eggs just before serving to preserve texture.
How do I adjust the heat level?
Increase white pepper for more heat, or add fresh chili oil or sriracha at the table. Start with 1 tsp white pepper and taste before adding more.
Can I double this recipe?
Yes. Double all ingredients and ingredients. Cooking time remains roughly the same since the soup heats quickly once broth reaches a simmer.