Heat butter and olive oil in a thick bottomed pot. Sauté onions and carrots until soft (about 3 minutes). Stir in flour and then add potatoes. Cook on medium heat for 1 minute.
Add chicken broth and bring to a boil. Add fish and smoked paprika. Cover and simmer, stirring occasionally until potatoes are soft (about 15-20 minutes). Fish should flake into small pieces.
