Place thawed chicken in crock pot. Top with cream of chicken soup, chicken broth and diced onions. Cook on High for 4-6 hours or Low for 8 hours. Do not stir while cooking.
Cut each uncooked biscuit into 9 small pieces and stir into the chicken mixture. Continue to cook on High for 30 minutes. Remove chicken from slow-cooker and shred with a fork. Return to slow-cooker and stir everything together. Serve hot.
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Slow Cooker Chicken and Dumplings recipe