Preheat your oven to 425ºF and grease a large casserole or 13X9-inch pan.
In a large skillet heat the butter over medium heat and cook the celery and onions until tender, about 5 minutes. Sprinkle the flour on top and cook, stirring, 1 minute. Stir in chicken broth and bring to a simmer and cook until thickened. Stir in 1/3 cup of milk and simmer 2 minutes. Remove from heat and stir in the chicken and salt and pepper to taste. Transfer to baking dish.
Meanwhile, stir together the baking mix and the remaining 2/3 cup of milk. Drop by spoonfuls onto the chicken mixture. Bake until biscuits are golden brown, about 25-30 minutes. Serve.
Notes
You can also make your own chicken by cooking up 4 chicken breasts and shredding them instead of the cooked rotisserie chicken.
To make these biscuits pop, brush with butter and minced garlic before and after baking.
Perfect Pairing
Serve this Biscuits and Gravy Casserole with Bee Sting Cocktails.
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