Imperial Red Fermented Tofu (Nanru)

🌍 Cuisine: Chinese
🏷️ Category: Pickles & Preserves
⏱️ Prep: 45 minutes
🍳 Cook: 20 minutes (plus 15-20 days fermentation)
πŸ‘₯ Serves: 2 large jars

πŸ“ About This Recipe

Often referred to as 'Chinese Cheese,' fermented tofu is a culinary marvel that transforms humble soy curds into a creamy, umami-rich delicacy through the power of salt-curing and aging. This version features the deep, earthy sweetness of red yeast rice and the warming kick of Sichuan peppercorns, creating a spreadable preserve that is both salty and floral. It is an essential pantry staple that adds unparalleled depth to braises, stir-frys, or a simple bowl of morning congee.

πŸ₯— Ingredients

The Tofu Base

  • 800 grams Extra-firm Tofu (cut into 1-inch cubes)
  • 1/4 cup Sea Salt (non-iodized is essential for fermentation)

The Brine & Flavoring

  • 1/2 cup Baijiu or High-proof Vodka (50% alcohol content or higher)
  • 2 tablespoons Red Yeast Rice Powder (for color and distinct flavor)
  • 1 tablespoon Sichuan Peppercorns (toasted and lightly crushed)
  • 2 tablespoons Chili Flakes (adjust to heat preference)
  • 1 tablespoon Sugar (to balance the saltiness)
  • 2 whole Star Anise (broken into petals)
  • 1 cup Boiled Water (cooled to room temperature)
  • 2 tablespoons Sesame Oil (to seal the top of the jar)

πŸ‘¨β€πŸ³ Instructions

  1. 1

    Sterilize your glass jars and all utensils by boiling them for 10 minutes; any stray bacteria can ruin the fermentation process.

  2. 2

    Cut the extra-firm tofu into uniform 1-inch (2.5cm) cubes. Pat them very dry with paper towels.

  3. 3

    Arrange the tofu cubes on a bamboo steamer or a wire rack set over a tray. Cover loosely with a clean cloth and let them air-dry in a cool, ventilated area for 24 hours until the surface feels slightly leathery.

  4. 4

    In a small pan, toast the Sichuan peppercorns over medium heat until fragrant (about 2 minutes), then crush them slightly in a mortar and pestle.

  5. 5

    Prepare the coating mix: in a shallow bowl, combine the sea salt, red yeast rice powder, chili flakes, sugar, and crushed peppercorns.

  6. 6

    Pour the high-proof Baijiu or vodka into a separate small bowl. This acts as a disinfectant and helps the spices adhere.

  7. 7

    Dip each air-dried tofu cube into the alcohol for 5 seconds, ensuring all sides are moistened.

  8. 8

    Immediately roll the alcohol-soaked cube in the salt and spice mixture until evenly coated on all sides.

  9. 9

    Pack the coated tofu cubes tightly into the sterilized jars, leaving about 1.5 inches of headspace at the top.

  10. 10

    Whisk the cooled boiled water with any remaining spice mixture and pour it into the jars until the tofu is almost submerged.

  11. 11

    Add the star anise petals to the jars and drizzle the sesame oil over the surface to create a protective barrier.

  12. 12

    Seal the jars tightly and store them in a cool, dark place (like a pantry) for 15 to 20 days. Do not open the jars during this time.

  13. 13

    After 15 days, check a piece with a clean utensil. The tofu should be soft, creamy, and have a pungent, savory aroma. If it is still firm, let it ferment for another week.

  14. 14

    Once the desired texture is reached, move the jars to the refrigerator to slow down the fermentation process.

πŸ’‘ Chef's Tips

Always use the highest proof alcohol you can find; it prevents mold and creates the signature 'funk' of the tofu. If you see black or fuzzy green mold, discard the batch; however, white spots are usually just protein precipitation and are safe. Never use tap water for the brine; the chlorine can interfere with the fermentationβ€”always use filtered or boiled and cooled water. Be patient with the air-drying step; removing surface moisture is key to ensuring the spices stick and the texture becomes creamy rather than mushy.

🍽️ Serving Suggestions

Smear a small amount onto hot, steaming white rice or plain rice congee for a classic breakfast. Use two cubes as a marinade for 'Red Fermented Bean Curd Pork Belly' (Zhu Rou). Whisk a cube into a dipping sauce for hot pot, combined with sesame paste and cilantro. Stir-fry water spinach or morning glory with a tablespoon of the brine for a hit of umami. Pair with a glass of chilled Riesling; the acidity cuts through the rich, salty creaminess of the tofu.