Marinate the Beef: In a mixing bowl, whisk together soy sauce, gochujang, sesame oil, brown sugar, minced garlic, and a pinch of black pepper. Add the ribeye or sirloin, ensuring it's well-coated with the marinade. Cover the bowl and let the beef marinate in the refrigerator for at least 30 minutes, or ideally overnight, to enhance the flavors deeply.

Prepare the Creamy Sauce: While the beef is marinating, make the creamy sauce by combining mayonnaise, sriracha, sesame oil, garlic powder, and a touch of sugar in a bowl. Whisk until the mixture is smooth and homogenous. Once prepared, cover it and place it in the refrigerator to chill and thicken while you move on to the next steps.

Cook the Broth: In a large pot over medium heat, pour in your choice of beef broth and bring it to a gentle simmer. Stir in gochugaru, soy sauce, rice vinegar, sesame oil, and salt to taste. Allow the broth to simmer for about 10 minutes, letting the flavors meld together while the kitchen fills with an enticing aroma, setting the stage for your Spicy Korean Ramen.

Prepare the Noodles: Once the broth is well-infused with flavors, add the ramen noodles to the pot. Cook according to package directions, usually around 2-3 minutes, ensuring they remain slightly al dente to maintain a wonderful texture. Gently stir to prevent sticking, and monitor closely to avoid overcooking.

Grill the Beef: Preheat a grill pan over high heat until it's hot and ready for searing. Remove the marinated beef from the refrigerator and place it on the grill pan. Sear for about 2-3 minutes on each side until beautifully caramelized and cooked to your desired doneness. Once grilled, let the beef rest on a cutting board for a few minutes before slicing it thin against the grain.

Assemble the Dish: To serve your Spicy Korean Ramen with Grilled Beef, ladle the noodles and broth into individual bowls. Generously drizzle the creamy sauce over the top, then artfully arrange the sliced grilled beef on each bowl. Finish with a sprinkle of chopped green onions and black sesame seeds for a delightful crunch, and serve with additional sriracha if you crave extra heat.