Bring a pot of water to a boil and cook rice cakes until soft. Drain and rinse with cold water.
Add the cheese sauce ingredients into a blender and blend until smooth.
Over medium heat, add the cheese sauce into a pot. Stir cheese sauce constantly until thick and starts to slightly stretch, around 5 minutes. Reduce temperature to low heat. Stir in the rice cakes until all the pieces are covered.
Serve immediately and garnish with green onions, sesame seeds and Korean red pepper flakes.
