1 In a large pot melt butter over medium heat and add onion, celery, chilies and garlic, cooking until onions are translucent. 2 Sprinkle flour over vegetables and combine. 3 Add chicken broth, cumin and chili powder. Bring to a simmer. 4 Add half-and-half while continuously stirring bringing soup back to a simmer. 5 Add shrimp and continue to cook until shrimp is cooked through (about four minutes). 6 Serve immediately, garnishing each bowl with chopped cilantro.