Potatoes and Caramelized Onion Casserole

"If desired sprinkle the top layer of potatoes with grated Parmesan cheese after pouring the stock over. Use a good quality chicken broth for this it really makes a difference!"
photo by Outta Here photo by Outta Here
photo by Outta Here
Ready In:
1hr 30mins




  • Set oven to 350 degrees.
  • Butter an 8-cup baking dish (or larger).
  • In a large skillet melt the butter with oil over medium heat add in sliced onions; saute stirring often until a rich golden brown (about 18-20 minutes).
  • Add in the garlic the last 5 minutes of cooking.
  • Add in the sherry and tarragon; cook until the liquid is absorbed season with salt and pepper, remove from heat and set aside.
  • Arrange a layer of sliced potatoes in the bottom of the baking dish, season with salt and pepper.
  • Top with 1/3 of the caramalized onion mixture.
  • Arrange another layer of potatoes over the onions, season with salt and pepper.
  • Repeat the layers until all of the potatoes and onions are used up (finishing the top with potatoes).
  • Bring the chicken stock to a simmer and pour slowly over the potatoes.
  • Cover the mixture directly but lightly with parchment paper, then cover the dish with foil.
  • Bake for about 40 minutes.
  • Uncover the dish and bake about 20 minutes more or until the potatoes are tender.
  • Cool for 10 minutes before serving.

Questions & Replies

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  1. Vineca G.
    I made these to serve alongside a carrots and brussel sprouts. Very comforting dish, thank you!
  2. Outta Here
    Great change from scalloped potatoes. I used the parmesan option, and they had a nice crusty top layer. Great with a pork roast. Next time I will also do the "can use more" option on the tarragon. :) I cut the recipe in half and cooked in a smaller baking dish.
  3. Baby Kato
    Wow! An excellant dish, just excellant, one that I will serve to company. This potatoe dish was a delight. The potatoes were nice and tender. The sauce created by the onions, garlic, tarragon & sherry was incredible, rich and savoury. I used sea salt. I will be making this dish often. Thank you so much for sharing.
  4. bluemoon downunder
    I certainly don't like sherry as a drink and I don't often use tarragon, but these ingredients blended beautifully in this scrumptious potato dish which we all thoroughly enjoyed. I used homemade chicken broth, and really recommend using this rather than a commercial broth. Clear instructions, easy to make: a wonderfully flavoursome dish which I'll certainly make again. Thanks for sharing.



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