The only thing better than a good recipe? When something’s so easy to make that you don’t even need one. Welcome to It’s That Simple, a column where we talk you through the process of making the dishes and drinks we can make with our eyes closed.

In Mandarin Chinese, the word zhajiang means “fried sauce,” and that sauce is composed of a hodgepodge of various aged and salty sauces slung together over high heat and then draped over wheat noodles to make zhajiangmian. A deep and pungent gravy originally from Beijing and its northern neighbors, traditional zhajiang is made with two main ingredients: gan huangjiang (fermented yellow soybean paste) and a bit of tianmianjiang (sweet fermented wheat paste).

Gan huangjiang is a chunky mixture of soybeans, salt, and water. In a fermentation process similar to that of miso, time breaks down beans and grains into a condiment with punchy, complex layers of taste. But while texturally similar to miso, yellow soybean paste is much saltier. Tianmianjiang, on the other hand, is an aged sauce composed mostly of wheat flour, salt, and a bit of soybeans. It’s syrupy, and because sugar is a by-product of the fermentation process, it’s sweet.

Cook these pastes together in oil at high heat and they transform into a rather complex sauce with notes of anchovy, molasses, and maybe even blue cheese. “For me as a chef, it’s all about the aromatics,” says executive chef Lucas Sin, who makes a version of zhajiang noodles at Junzi Kitchen, a fast-casual modern Chinese food chain in New York City. “It’s about the flavorful umami aromas that happen only when you cook something in oil at relatively high temperatures.”

While zhajiang originates from the north of China, variations exist all over East Asia. I grew up with the Taiwanese rendition heavy on sugar and ground pork with an almost Bolognese-like consistency. Korea has its own variety known as jjajangmyeon with an inky jet-black soybean sauce. While there’s no official rubric, many in northern China swear that proper zhajiang should consist mostly of gan huangjiang.

Unfortunately in the West, gan huangjiang is almost impossible to procure. Instead, I like using huang doujiang, or soybean sauce, from Lee Kum Kee, which is a less concentrated version of the aforementioned. Others consider red miso a more accurate substitute. 

Tianmianjiang, the other key ingredient, adds a much needed layer of sweetness. But if that can’t be found, hoisin sauce—a sweet fermented soybean paste—is a good and more common alternative. Lastly I add a splash of dark soy sauce for color. In his zhajiang, Sin likes throwing in doubanjiang (spicy fermented fava bean paste) from Sichuan and douchi (whole fermented black beans) for added depth. “I know it’s not exactly traditional,” he admits. But it works really well, since there isn’t as much complexity or variety to the soybean sauces available in America compared to China.

All these different types of fermented soy-based sauces and pastes can get really confusing, especially since they are all variations of salt, aged soybeans, and water. But once you get your basics down, it’s as simple as making a salad dressing. Here’s my quick and easy recipe: Make your zhajiang first. In a small bowl or cup, combine 3 Tbsp. soybean sauce, 1 Tbsp. tianmianjiang or hoisin sauce, 1 tsp. sugar, 1 Tbsp. Shaoxing wine or cooking wine, and 1 Tbsp. dark soy sauce. Stir to incorporate and set the sauce aside for later.