Place all ingredients except Parmesan and cheddar in a slow cooker. Stir to combine. Cook on high for 6 hours or low for 10.
Once broccoli is cooked, turn the slow cooker off, and add in the Parmesan and cheddar. Stir until melted.
Blend with an immersion blender (or ladle some soup into a blender*) and blend until desired consistency.
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Notes
*If you use a blender, make sure to leave the top off but cover with a towel. Blending super hot ingredients with the top on is no bueno and will create a huge mess!
Nutritional information is provided as a courtesy only and should be construed as an estimate rather than a guarantee. Ingredients can vary, and Pineapple House Rules makes no guarantees to the accuracy of this information.