Place butter, onion and garlic into the instant pot. Sautee the items until butter is melted and onions are tender.

Add broccoli, chicken broth and spices. Mix well.

Place the lid on the instant pot and close the pressure release seal. Set the instant pot to manual, high pressure for 4 minutes. When cooking cycle is complete, quick release steam and open the instant pot.

Carefully place an immersion blender into the pot and process until smooth. Stir in cheese and half & half until completely melted.