Skim 2 tablespoons of coconut cream from the top of one can of coconut milk and set aside.
In a medium pot, heat 2 tablespoons of coconut cream over medium heat. Add the Khao Soi paste and cook until fragrant and the color intensifies (about 3 minutes).
Add chicken or short ribs. If using chicken, place skin-side down and cook until browned (about 3 minutes). If using short ribs, sear on all sides for about 3 minutes.
Pour in the remaining coconut milk and bring just to a gentle boil.
Reduce the heat to low and season with fish sauce and palm sugar. Simmer for 15 minutes, allowing the flavors to meld.