To a pot with 2 cups (480 ml) of boiling water add the ramen seasoning packet and a tablespoon of butter. Stir until the butter melts and then add the ramen noodle cube and cook until the noodles become tender, 2 minutes. Pour the ramen into a bowl.
To the prepared ramen, add the coconut milk, green curry paste, and fresh lime juice. Stir to incorporate.
Garnish with peanuts, jalapeño, and cilantro, if using.