Add carrots, squash, sweet potato and onion to the butter and cook stirring occasionally, about 10 minutes.
Add chilis, cumin, a pinch of salt and pepper stirring to blend. Continue cooking for 10 minutes.
Add chicken broth and bring to a boil. Reduce heat and simmer for 30 minutes. Remove from heat.
Using a hand mixer, purée vegetables until smooth, thinning with a little chicken stock or water if desired. Taste and adjust seasoning as needed. Cover pot and simmer on low until ready to serve.
Pour into bowls when ready to serve. Garnish each with a generous swirl of sour cream and bacon crumbles. Enjoy immediately. Refrigerate any leftovers.