Split the butternut squash in half lengthwise, drizzle with olive oil and roast in oven until soft.
Scoop the soft roasted flesh into a heavy-bottomed soup pot. Add chicken broth, onion powder, red chili pepper flakes, garlic powder and ground celery root. Heat through.
Using either an immersion blender or a regular blender, blend soup until smooth. Season to taste.
Add heavy cream and TA-DA your soup is ready! Let the Netflix binge begin!