Caramelized Onion Potatoes

These Caramelized Onion Potatoes are rich, velvety, and honestly so hard to stop eating. Tender potatoes tossed with sweet caramelized onions, whole roasted garlic, and tangy sun-dried tomatoes in a creamy, cozy sauce — simple ingredients that taste like absolute perfection directly from the pan.

Course Side Dish

Cuisine American

Prep Time 10

Cook Time 50

Total Time 1

Servings servings

Calories 389kcal

Author Julia Maz

Ingredients

4 large onions, sliced into rings
1 head garlic, top sliced off
½ cup sun-dried tomatoes, chopped
3 tbsp sun-dried tomato jar oil (or olive oil)
1.5 lbs potatoes, cooked and cut into wedges
1 tsp paprika
1 tsp Italian seasoning
1 tsp salt, or to taste
½ tsp black pepper, or to taste
½ cup coconut milk
¼ cup reserved potato cooking water as needed
2 tbsp fresh parsley, chopped
2 tsp lemon juice

US Customary - Metric

Instructions

Add the sliced onions, oil from the sun-dried tomato jar (or olive oil), chopped sun-dried tomatoes, paprika, Italian seasoning, salt, and black pepper directly into a baking dish and mix well to combine.
4 large onions, sliced into rings, ½ cup sun-dried tomatoes, chopped, 1 tsp paprika, 1 tsp Italian seasoning, 1 tsp salt, or to taste, ½ tsp black pepper, or to taste, 3 tbsp sun-dried tomato jar oil (or olive oil)
Place the whole head of garlic in the center, cover the dish with aluminum foil, and bake at 400°F (200°C) for about 40–45 minutes, until the onions are soft and caramelized.
1 head garlic, top sliced off
Squeeze the roasted garlic cloves out of their skins into the baking dish, then add the coconut milk, reserved potato cooking water, fresh parsley, and fresh lemon juice.
½ cup coconut milk, ¼ cup reserved potato cooking water as needed, 2 tbsp fresh parsley, chopped, 2 tsp lemon juice
Mix everything together until a rich, creamy sauce forms, then add the boiled potatoes.
1.5 lbs potatoes, cooked and cut into wedges
Gently mix until every potato piece is well coated in the sauce, and serve warm.

Video

Notes

👩‍🍳 Cooking Tips for the Best Caramelized Onion Potatoes

🥔 Choose the right potatoes: Yukon Gold or yellow potatoes work best for this recipe because they hold their shape perfectly while absorbing that creamy sauce.

🧄 Don't skip the foil: Covering the baking dish for the first 40–45 minutes is key—it traps the steam so the onions get super soft and jammy without burning.

💧 Adjust sauce consistency: Start with ¼ cup of reserved potato cooking water and add more as needed to get that ultra-silky, glossy texture.

🍋 Finish with fresh lemon: Add the fresh lemon juice right at the end to brighten up the rich roasted flavors and give the sauce a light, fresh bite.

🧅 Onions are naturally sweet, savory, and the true unsung hero of home cooking. When slow-roasted, they transform into deeply caramelized, jammy goodness that brings warmth and richness to any dish, while also being rich in antioxidants and immune-boosting compounds. If you’re curious about all the incredible benefits packed into this humble kitchen staple, there’s a quick read you might enjoy.

🔀 Recipe Variations

🌶️ Make it spicy: Add a pinch of red pepper flakes or a dash of cayenne pepper to the onion and oil mixture before baking for a warm, fiery kick.

🧀 Add a cheesy touch: Sprinkle nutritional yeast into the sauce, or top the finished dish with your favorite plant-based parmesan for an extra savory layer.

🥬 Add extra greens: Stir in a few handfuls of fresh baby spinach or kale right at the end with the hot potatoes so it wilts gently into the creamy sauce.

🌿 Switch up the herbs: Swap the fresh parsley for chopped fresh rosemary, thyme, or dill to give the roasted sauce a totally different herbal vibe.

🫙 Storage & Make-Ahead

🧊 Storage

Keep any leftovers in an airtight container in the fridge for up to 4 days. Reheat gently on the stove over low heat or in the microwave, adding a splash of water or coconut milk to bring the sauce back to its silky texture.

⏳ Make-ahead tip

You can boil the potatoes and chop the sun-dried tomatoes a day in advance. Store them in sealed containers in the fridge so when you're ready to cook, all you have to do is toss the onions in the dish and pop it in the oven!

Nutrition