In a casserole, heat butter and oil and brown chicken, season with salt and pepper of desired. Warm brandy in saucepan and pour over chicken, allow flame to burn itself out.
Add apples and onion, combine cider, sour cream, flour and herbs, stir until smooth and pour over contents of casserole. Bake, covered at 350 degrees for 1 hour or until chicken is tender.
If you want, 2 cups of cider or apple juice may be used, just omit the sour cream and use 2 tablespoons of flour. You can also try it without the tarragon using ¼ teaspoon each of nutmeg, cinnamon and ground cloves.
