Coat a nonstick skillet with cooking spray and heat. Add mushrooms, onion, garlic and pepper; saut? 5 minutes. Stir in paprika, salt and pepper; cook 30 seconds more. Spoon mixture into a 4- to 5-quart slow cooker; add broth.
Cut each chicken breast into 4 long strips; add to slow cooker. Cover and cook on low setting for 5 to 6 hours.
Stir together flour and sour cream in a cup; stir into chicken mixture. (Note: We stir flour into the sour cream to prevent the cream from curdling in slow-cooked dishes.) Cover and cook on low until the mixture is thick and hot, about 10 minutes more.
Find any recipe, add your own, make grocery lists easily from recipes. Enter any 3 ingredients and BigOven will tell you what you can make. It's free! (4.5/5 stars)