With this recipe, I’ve slow-cooked oxtail sections within my broth in a good slow cooker, which helps render the fat from the bones without having to constantly stir. You could also make this in a crock pot, large Dutch oven, or heavy-duty pot. The oxtail adds a meaty goodness and complexity to the fat component that complements the soy sauce. You’ll have to go to an Asian market to find dashi, or Japanese stock, which comes in granular form—there are many varieties to choose from, so just make sure to pick one that has bonito sh as the primary ingredient. It’s also important to have dried shiitake mushrooms, as they’ll give a more intense avor to the soup than fresh ones. The nal soup will taste overly salty, but when the noodles are added in, they will soak up the sauce and balance it out.
4 tbsp bacon fat (optional but recommended)
2 medium-sized carrots, peeled and cut into large dice 1⁄2 onion, peeled and cut into large dice
3 green onions, cut into thirds
1 apple, cored and quartered (with skin on)
2 celery stalks, cut into thirds
5 garlic cloves, peeled and left whole
5 dried shiitake mushrooms, broken up into small pieces 1 whole organic chicken
4 medium oxtail sections, roughly 2 inches (5 cm) long
1 lemon, quartered
2 qts (2.2 L) low-sodium chicken stock
3⁄4 cup (175 ml) high-grade soy sauce
4 tsp dashi granules (Japanese stock)
2 tbsp salt
1⁄2 tsp white pepper
1 bay leaf
In a crock pot, slow cooker, large Dutch oven or heavy-duty pot, combine the bacon fat, carrots, onion, green onions, apple, celery, garlic, and dried shiitake mushrooms.
Add the whole chicken, oxtails, and lemon, then pour over the chicken stock, followed by the soy sauce, dashi, salt, pepper, and bay leaf—the stock should almost cover the chicken.
Set the crock pot or slow cooker to high and let cook for 10 hours. If using a large Dutch oven or pot, bring to a boil over a high heat and set in an oven preheated to 200F (90C) for 8–10 hours. When the oxtail meat easily falls off the bone, your soup is done.
With a slotted spoon, remove all of the larger solids and discard. Strain the remaining solids with a finer sieve into a large pot. You should have a light brown, glossy, and fat-rich soup. At this point the stock can be refrigerated for up to 2 weeks or frozen for 1 month.
In a separate saucepan, bring the Shoyu Base to a boil, then lower the heat and let simmer until it’s ready to serve. Right before serving, crank it back up to a boil.
Pour 2 cups soup (475 ml) over each bowl of noodles. Top each bowl with desired toppings.