Add butter to Dutch oven or large pot. Melt butter and add onions. Cook onions until they are tender/translucent.
Add chicken broth to pot and bring to a boil.
Add cheese and whisk until broth is smooth and cheese has melted.
Add potatoes and celery and let simmer for about 15 mins to let potatoes soften.
Lastly, add milk and shrimp and cook for 3-5 mins. until shrimp turn pink.
Ladle into in bowls, garnish with pepper and parsley.
Enjoy!