Gochujang
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Gochujang is a Korean red chili paste and just like sriracha, there are a lot of brands out there. Chung Jung Won is a safe bet and comes in a red plastic tub, which helps it stand out if your Korean isn't up to snuff. Deeper in color than sriracha, and sweeter, gochujang is traditionally used in cooking but works just as well on burgers as it does in bibimbap.