Get out and measure your ingredients.
Turn your Instant Pot to the sauté function and add 2 tablespoons of butter. When the butter melted, add the diced onion and celery. Sauté until the vegetables are tender.
Add garlic and cook for another 30 seconds.
Add chicken broth to the cooked onions, garlic, and celery.
Add broccoli and carrots to the Instant Pot.
Lock your lid in place and make sure your vent or valve is sealed. Set the timer and pressure cook for 2 minutes.
When the time is up release the pressure and allow the steam to vent until you can open the lid.
In the meantime, melt ½ cup of butter in a small bowl and microwave or melt it in a pot on the stove.
Slowly whisk in flour until blended and creamy. Set aside.
Turn your Instant Pot back to the sauté function. Add a cup of the hot broth from your instant pot to your butter mixture and continue to whisk until blended. Next, add the remaining mixture to your instant pot. Whisk or stir until soup thickens.
Heat up your milk on your stove or in microwave UNTIL VERY WARM. DO NOT BOIL. Never add cold milk to anything hot or it will curdle. Once warm, slowly add milk to instant pot stirring frequently. Mixture will be creamy and thickened.
Add the shredded cheese and stir until melted. Season with salt and pepper.
Place half of the soup in a blender and give it a few quick pulses before returning to instant pot, or use an immersion blender or even a potato masher to break up broccoli and smooth soup, if desired. You can skip this blender part if you are short on time, but pureeing some of the vegetable chunks really gives this soup that smooth Panera texture.
Ladle into bowls and serve.
Serve with a side of bread or in a bread bowl for a classic Panera style meal.
Enjoy every sip!