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Mashed Potatoes with Caramelized Onion – Thanksgiving Side Dish

I think I need a support group.

Specifically, a Caramelized Onions support group. I could eat caramelized onions by the spoonful. I love the way they taste. I love the way they make my house smell when they are caramelizing. And I love the way they make mashed potatoes taste better.

I will be taking these to our Thanksgiving feast. Rest assured.

Caramelized Onion Mashed Potatoes

Yield – 6 to 8 servings

Preparation Time -10 minutes

Cooking Time – 30 minutes


  • 2 Tbsp olive oil
  • 2 Tbsp white sugar
  • 2 Tbsp balsamic vinegar
  • 2 large white onions, sliced
  • 6 large potatoes
  • About 1/3 cup butter
  • About 1/2 cup milk (butter-milk portions vary, depending on potato size)
  • (Use sour cream, cream cheese…whatever you like to use when making your mashed potatoes)
  • Salt and pepper to taste



  • Caramelize the onions – heat the olive oil, sugar and balsamic vinegar in a large skillet.  Add the chopped onions. Let cook over medium-low heat for 30 minutes, stirring often.
  • Peel, cube and boil potatoes in a large pot of water. Once soft, drain and mash with the butter, milk (or whatever else) and salt and pepper.
  • Combine the mashed potatoes with the caramelized onions.
  • Serve warm as side dish.