In a large pot, heat butter or oil. Cook onion and garlic until onion is translucent.

Increase heat and add stock. Bring to a boil, then reduce heat to medium.

Add broccoli, coconut milk, salt and pepper. Cook for 5 minutes, stir occasionally, or until broccoli is soft.

Pour into blender and blend until smooth or blend in the pot with an immersion blender.