These Caramelized Onion Mashed Potatoes are the perfect balance between simplicity and indulgence. The velvety, buttery, creamy mashed potatoes are infused with rich, sweet-savory caramelized onions and a sprinkle of thyme. Giving you a side dish with the warmth and comfort that good food brings. So whether you're gearing up for a festive holiday feast, a hearty Sunday roast, or a simple midweek meal with chicken or steak, this recipe is your ticket to comfort-food heaven.
Melt the butter and oil together in a large skillet or frying pan.2 tbsp butter1 tbsp oil
Once melted, add the onions, salt, and thyme leaves. Stir to coat the onions in the butter, then cook over medium-low heat for 20-25 minutes, stirring occasionally.3 onions¼ tsp salt1 tbsp thyme leaves
While the onions are cooking, start the potatoes.
Bring a pan of water to a boil, then add the salt and potatoes.1 tbsp salt3 lb/ 1.3kg potatoes
Cook for around 12-15 minutes until the potatoes are very soft. You should be able to push a fork through them easily.
Drain the potatoes and let them steam in the sieve or colander for 2 minutes before returning them to the pan.
Use a potato masher or a potato ricer to mash the potatoes.
Add the butter, cream, dijon mustard, and pepper, then stir well with a wooden spoon.4 tbsp butter½ cup/ 120ml heavy cream1 tbsp Dijon mustard¼ tsp pepper
Stir in the onions, then taste and add more salt if needed.