Prepare all ingredients: Slice chicken, chop onion, and prepare lemongrass, galangal, lime leaves, chili peppers, mushrooms, and cilantro.

In a pot, combine coconut milk, lemongrass, galangal, white onion, and kaffir lime leaves.

Bring the mixture to a boil, then reduce heat and simmer for a few minutes to infuse the flavors.

Add the chicken and mushrooms to the pot and cook until the chicken is cooked through (approximately 5-7 minutes).

Season with salt to taste.

Turn off the heat and stir in the lime juice and cilantro.

Serve hot in bowls.