Pork Belly Buns with Spicy Mayo, Scallions, and Pickled Bean Sprouts Recipe

Once the chashu pork has been cooked, these delicious buns practically make themselves.

By
J. Kenji López-Alt
Kenji Lopez Alt
Culinary Consultant
Kenji is the former culinary director for Serious Eats and a current culinary consultant for the site. He is also a New York Times food columnist and the author of The Food Lab: Better Home Cooking Through Science.
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Updated November 24, 2023
Closeup of a pork belly bun with spicy mayo, scallions, and pickled bean sprouts.

Serious Eats / J. Kenji López-Alt

Why It Works

  • Heating the slices of chashu pork in their braising liquid lightly glazes them, adding an extra layer of flavor.
  • The optional blowtorch makes charring the pork quick and easy.
  • Sweet-tart pickled bean sprouts and creamy, chile-spiked mayo balance and round out the rich flavor of the pork belly.

I'm not sure who the first person to stuff sweet and fatty tender braised chashu-style pork belly into a lily-white steamed Chinese bao bun was, but they've certainly taken off like gangbusters. Pretty much every ramen shop in the city features a variation on the theme, from the braised Niman Ranch pork buns with hoisin, scallion, and cucumber at Momofuku Noodle Bar to the charred pork neck buns with sweet Japanese mayo at Hide-Chan.

It's a natural fit, since all these ramen shops have braised pork on hand for their ramen anyhow; all it takes is a tender, steamed bun and a couple condiments, and bam, instant profit.

"Making these at home is ridiculously easy."

Lucky for us, now that we know how to make our own chashu pork at home and steamed folded bao are readily available from any Chinese market, making these at home is ridiculously easy.

After you've made the pork, the first step is reheating it. Braised pork belly is tender and gelatinous, making it nearly impossible to slice. Instead, I slice it after it's completely cool in order to get neater, cleaner slices. For pork buns, I like my slices thicker than for ramen, but not massively so. About 1/4-inch is enough.

Closeup of thick chashu pork slices being reheated in broth.

Serious Eats / J. Kenji López-Alt

Reheating them by simmering them in leftover broth helps to make sure that they stay moist, as well as adding extra flavor that rides up into the cracks and crevices of the meat. It'll also play a crucial role in helping crisp and caramelize the meat later on.

Crisping the Pork

The best part of pork belly buns is that great contrast between soft bun and crisp pork. There are a couple of ways to achieve it. The most straight-forward is to use the broiler, making sure that it's blazing hot before adding the pork as close to the broiler element as possible.

Charred chashu slices fresh from the broiler.

Serious Eats / J. Kenji López-Alt

It'll spit and sputter a bit as it cooks, but don't worry, it'll soon learn how to behave properly.

The alternative method is to pull a Marsellus Wallace and get medieval on its a%&. This method has the advantage of being way faster and easier than the broiler method. It has the disadvantage of requiring a blowtorch.

Chashu slices are charred with a blowtorch.

Serious Eats / J. Kenji López-Alt

A blowtorch gets much hotter than a broiler element does, which not only allows you to heat your pork faster, but it'll also create a much greater flavor and textural contrast within your bun as the pork belly blisters, bubbles, and burns under the intense heat of the flame.

Torched chashu slices, ready to fill buns.

Serious Eats / J. Kenji López-Alt

Warming the Buns

As for the buns, you can make your own, but I find the pre-made ones in the refrigerator case at the Chinese grocer to be more than adequate provided they're reheated properly. Steaming in a bamboo steamer set over a wok works, and is a good method if you plan on having a big party and want to keep a constant supply warm. For a smaller number of servings, however, the microwave is the tool of choice.

By placing the buns on a plate, covering them with a damp paper towel or damp clean kitchen towel, and microwaving for just a minute or so, they come out as hot, puffy, and steamy as the best fresh-baked bao.

There are so many ways to top pork belly buns that I don't even know where to begin, but I personally like to think of my toppings in three discrete elements: a fresh vegetable, a sweet-tart pickle, and a creamy sauce. In this case, I've gone with scallions, pickled bean sprouts, and a slathering of spicy mayo.

March 2012

Recipe Details

Pork Belly Buns with Spicy Mayo, Scallions, and Pickled Bean Sprouts Recipe

Prep 5 mins
Cook 15 mins
Active 15 mins
Total 20 mins
Serves 6 to 12 servings
Cook Mode (Keep screen awake)

Ingredients

For the Pickled Bean Sprouts:

  • 1 cup rice vinegar

  • 1 cup water

  • 1 cup sugar

  • 1 tablespoon salt

  • 3 cups picked mung bean sprouts

For the Spicy Mayonnaise:

  • 1/2 cup mayonnaise

  • 2 tablespoons chile paste, such as sriracha, gochujang, or sambal oelek

To Assemble:

  • Twelve 1/4-inch-thick slices chashu pork

  • 1 cup reserved broth from chashu pork recipe

  • 6 scallions, finely sliced at a heavy bias

  • Shredded iceberg lettuce (if desired)

  • 12 Chinese folded steamed buns (see note)

Directions

  1. Make the pickled bean sprouts: Combine water, vinegar, sugar, and salt in a small saucepan. Bring to a boil over high heat, stirring until sugar and salt are dissolved. Place bean sprouts in a small bowl. Pour hot pickling liquid over them. Cover with a paper towel, pressing the towel down into the liquid to make sure sprouts are completely submerged. Set aside.

  2. Make the spicy mayo: Combine mayonnaise and chile paste in a small bowl. Stir with a fork until combined. Set aside.

  3. Char the pork: Place pork slices in a medium skillet and pour broth on top. Heat over medium-high heat until simmering and pork slices are heated through. Transfer with a slotted metal spatula to a foil-lined rimmed baking sheet. Using a blowtorch or kitchen torch, char top of each slice by running the flame rapidly back and forth over each slice until evenly crisped. Flip and repeat on second side. Alternatively, use the broiler (see note).

    A blow torch is crisping up chashu pork slices on a foil lined baking sheet.

    Serious Eats / J. Kenji López-Alt

  4. Assemble the buns: Heat buns (see note). Spread mayonnaise mixture evenly over inside of each bun. If using, spread some shredded iceberg lettuce on bottom half of bun. Lay a slice of pork in each and top with pickled bean sprouts and sliced scallions. Close buns and serve.

Special Equipment

Kitchen blowtorch (optional)

Notes

Folded Chinese-style steamed buns can be found in the refrigerated or frozen section of most Chinese markets. To reheat, first allow buns to thaw to room temperature in their packaging (if frozen). Transfer six to a large microwave-safe plate and cover with a double layer of damp paper towels. Microwave at high power until hot, about 1 1/2 minutes. Repeat with remaining buns. Alternatively, buns can be reheated in a bamboo steamer set over a wok of simmering water.

If you don't have a blowtorch, pork belly slices can be charred by arranging on a foil-lined baking sheet and placing 2 inches from a preheated broiler until crisp and brown. Flip slices and repeat to brown second side.

Read More

Nutrition Facts (per serving)
336Calories
20gFat
21gCarbs
17gProtein
×
Nutrition Facts
Servings: 6 to 12
Amount per serving
Calories336
% Daily Value*
Total Fat 20g26%
Saturated Fat 6g29%
Cholesterol 55mg18%
Sodium 929mg40%
Total Carbohydrate 21g8%
Dietary Fiber 2g7%
Total Sugars 15g
Protein 17g
Vitamin C 40mg202%
Calcium 74mg6%
Iron 1mg8%
Potassium 417mg9%
*The % Daily Value (DV) tells you how much a nutrient in a food serving contributes to a daily diet. 2,000 calories a day is used for general nutrition advice.
(Nutrition information is calculated using an ingredient database and should be considered an estimate.)

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