Boil 2 cups of water in a pot and cook the noodles from the buldak ramen package according to the instructions on the packaging, but do not add the sauce yet.

Once the noodles are cooked, drain most of the water, leaving about 2-3 tablespoons of liquid in the pot.

Reduce the heat to low and add the spicy buldak sauce packet to the noodles, stirring until the noodles are evenly coated.

In a separate bowl, whisk the heavy cream, egg yolk, Parmesan cheese, and garlic powder until smooth.

Add the butter to the noodles and allow it to melt completely, stirring well.

Slowly pour the carbonara mixture into the noodles, stirring constantly to combine. Ensure the heat is low to avoid scrambling the egg yolk.

For extra flavor, add diced cooked bacon or ham if desired, and stir until evenly distributed.

Plate the buldak carbonara ramen and garnish with chopped green onions. Serve immediately!