01 -
Combine soy sauce, gochujang, sesame oil, brown sugar, minced garlic, and black pepper in a bowl. Add the beef and marinate for 30 minutes or up to overnight for enhanced flavor.
02 -
Whisk together mayonnaise, sriracha, sesame oil, garlic powder, and sugar until smooth. Refrigerate until ready to serve.
03 -
Bring broth to a simmer and stir in gochugaru, soy sauce, rice vinegar, sesame oil, and salt. Add noodles and cook until al dente, approximately 3 minutes, then remove from heat.
04 -
Heat a grill pan or skillet over high heat. Sear the marinated beef for 2 to 3 minutes per side until nicely caramelized. Allow to rest briefly, then slice thinly against the grain.
05 -
Divide noodles and broth between bowls. Top with the creamy sauce, sliced grilled beef, chopped green onions, toasted black sesame seeds, and optional chili oil or gochugaru for additional heat.