Preheat the oven to 375°F. Coat the baking dish in nonstick spray.
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1
In a small bowl mix the mayonnaise, buttermilk, Parmesan, garlic powder, paprika, tarragon, and a pinch of salt and pepper.
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Lay the chicken breasts in the prepared baking dish.
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Smother the chicken breasts with all of the Parmesan sauce. Bake for 40–45 minutes, until the chicken breasts are cooked through.
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