Start by peeling and dicing your potatoes, chopping the onion and celery, and gathering the rest of your ingredients. This little prep work upfront makes assembly quick and easy.
Place your chicken breasts in the bottom of your crock pot. Then, add the chopped onion, potatoes, celery, frozen vegetables, and all the seasonings. Pour in the cream of chicken soup and milk, stirring slightly to combine. Cover and cook on low for 6–8 hours or high for 3-4 hours.
Remove the cooked chicken breasts from the crock pot and shred them using two forks. Add the shredded chicken back into the pot and mix well.
While your chicken pot pie filling finishes cooking, bake the buttermilk biscuits according to their package directions. This timing ensures perfectly warm, fluffy biscuits right as your crock pot dish is ready to serve.
Spoon the creamy, hearty chicken mixture into bowls and place a warm biscuit on top for a complete, satisfying meal.