Bring a medium pot of water to a boil. Add the ramen noodles and cook according to package directions, but undercook by about 1 minute so they stay chewy when stir-fried in the buldak sauce.
2 packs ramen noodles, 2 cups water
Before draining the noodles, scoop out 1/4 cup of the starchy cooking water and set aside. Drain the noodles well. Toss with a tiny drizzle of oil if you’re worried about sticking, but do not rinse.
In a small bowl, whisk together the gochujang, gochugaru, soy sauce, brown sugar, mirin or rice vinegar, and 2 tablespoons of water or chicken broth. The mixture should be thick but pourable. Taste carefully and adjust sweetness or spice as needed.
2 tablespoons gochujang, 1-2 tablespoons gochugaru, 2 tablespoons soy sauce, 1 tablespoon brown sugar, 1 tablespoon mirin or rice vinegar, 2 tablespoons water or chicken broth
In a large nonstick skillet or wok, heat the neutral oil over medium heat. Add the minced garlic and ginger and cook for 30–45 seconds, just until fragrant, adjusting the heat to prevent burning.
2 cloves garlic, 1 teaspoon ginger, 1 tablespoon neutral oil
Pour the buldak sauce mixture into the skillet with the aromatics. Stir and let it simmer gently for 1–2 minutes, until slightly thickened and smelling smoky and rich. If it looks too thick, add a splash of the reserved noodle water.
Add the drained ramen noodles to the skillet. Toss with tongs or chopsticks until every strand is coated and glossy, adding more reserved noodle water as needed if the noodles seem dry or sticky. Stir in the butter until melted for extra richness.
2 packs ramen noodles, 1 tablespoon butter
Reduce the heat to low and mound or spread the noodles evenly in the skillet. Sprinkle the shredded mozzarella cheese over the top. Cover with a lid and let cook for 1–3 minutes, until the cheese melts into a gooey blanket.
1/2-1 cup shredded mozzarella cheese
Remove from the heat. Top with sliced green onions, sesame seeds, nori strips, and any additional toppings you like such as soft-boiled eggs, kimchi, vegetables, or cooked protein. Serve immediately while hot and the cheese is still melty.
1-2 green onions, 1-2 soft-boiled or jammy eggs, kimchi, sesame seeds, nori strips, cabbage, bok choy, or spinach, cooked chicken, shrimp, or tofu