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Baked chicken covered in seasoning in clear casserole dish.

Baked Chicken and Sweet Potato Gratin

Baked Chicken and Sweet Potato Gratin - This juicy baked chicken with sweet potato gratin is absolutely delicious. It is one of our favourite dinners!

Course Dinner
Cuisine American
Keyword Chicken and Gratin, Sweet Potato Gratin
Prep Time 10 minutes
Cook Time 50 minutes
Total Time 1 hour



  • 9 Chicken Drumsticks Skin Off, Bone In
  • 1 tbsp Olive Oil
  • 1 tbsp Soy Sauce
  • 1 tbsp Mustard
  • 2 cloves Garlic Crushed
  • 1 tsp Smoked Paprika
  • 1 tsp Onion Powder
  • 2 tsp Mixed Herbs
  • 1 tsp Cumin Powder
  • Salt and Pepper
  • 1 tbsp Olive Oil

Sweet Potato

  • 2 lb Sweet Potatoes peeled and sliced into 1/8 inch slices 6 medium sized
  • 300 ml Milk of choice I use Almond
  • 100 ml Chicken Stock
  • 1 tbsp Plain Flour
  • 1 Onion Peeled and diced
  • 5 cloves Garlic crushed
  • Salt and Pepper
  • 60 g Mozzarella Grated
  • 3 tbsp Parmesan/Grana Padano


  1. Preheat oven to Gas Mark 6/200 degrees C.

  2. Marinade the chicken in all the ingredients under the chicken list.

  3. Heat the oil in a large pan, over medium high heat and add the chicken. Brown on each side for 2-3 minutes. Remove the chicken and marinade leaving about 2 tbsp marinade in the pan. Set aside.

  4. Stir flour into the pan and whisk in. Add the onions and cook over a low heat for 3-4 minutes.

  5. Pour in the milk, stock, garlic and salt and pepper.  Bring to the boil, then simmer for 5 minutes or until thickened. Add the sweet potato slices, mix in  and remove from the heat.

  6. Grease a large casserole dish (9 x13) with butter. Add half the Sweet potato mixture to the bottom of the dish, then add half of each cheese. Add another layer of sweet potato and cheese. Then top with the chicken and marinade.

  7. Cover with foil and bake for 40 minutes covered. Remove foil and bake for a further 10 minutes uncovered.