Onions are one of the most versatile ingredients in the kitchen. Their ability to add sweetness, savoriness, and depth of flavor to any dish is unmatched. When used in side dishes, onions can be caramelized for a rich, sweet flavor, roasted for a smoky edge, or used fresh to add crispness and bite. These 14 savory onion side dishes will help you highlight onions in new, exciting ways and pair perfectly with everything from grilled meats to roasted vegetables. Whether you’re preparing a weeknight meal or a special occasion, these dishes will become a staple on your dinner table.
1. Caramelized Onion and Mushroom Skillet
This savory side dish features sweet caramelized onions and earthy mushrooms, both sautéed in butter until golden and tender. The combination of onions and mushrooms creates a rich, savory flavor that pairs wonderfully with roasted meats or even a simple vegetable-based main dish. The dish is finished with a touch of balsamic vinegar for a subtle tang, and fresh thyme brings a herbal note that balances out the sweetness of the onions. et the recipe: Caramelized Onion and Mushroom Skillet
2. French Onion Gratin
A twist on the classic French onion soup, this French onion gratin takes caramelized onions and layers them with melted cheese and toasted bread crumbs, creating a savory and satisfying side dish. The combination of deep-flavored onions, gooey cheese, and crispy topping makes for a perfect comfort dish that pairs beautifully with grilled meats or roasted chicken. Get the recipe: French Onion Gratin
3. Oven-Baked Onion Rings
Forget the fried version—roasted onion rings are a healthier alternative that still provides that deliciously crispy texture. The onions are sliced into thick rings, lightly coated in olive oil, and roasted in the oven until golden and crisp. Served with a tangy dipping sauce, these roasted onion rings are a perfect side dish or snack to serve alongside burgers, salads, or grilled vegetables. Get the recipe: Oven-Baked Onion Rings
4. Balsamic Roasted Onions
Sweet onions are roasted with balsamic vinegar, olive oil, and herbs to create a simple yet flavor-packed side dish. The balsamic vinegar brings a tangy sweetness that caramelizes during the roasting process, giving the onions a rich depth of flavor. This dish pairs well with roasted meats, such as pork or chicken, and is perfect for any fall or winter meal. Get the recipe: Balsamic Roasted Onions
5. Garlic Herb Mashed Potatoes
Elevate your mashed potatoes by incorporating savory onions and fresh herbs. Caramelized onions are mixed into creamy mashed potatoes, creating a rich, flavorful side dish. The sweetness of the caramelized onions enhances the natural creaminess of the potatoes, while the herbs (like rosemary or thyme) add aromatic depth to the dish. Get the recipe: Garlic Herb Mashed Potatoes
6. Pickled Red Onions
Pickled red onions add a tangy, vibrant contrast to rich and savory dishes. The sharpness of the vinegar and the sweetness of the onions balance each other perfectly. These quick pickled onions can be made in just a few hours and are perfect for adding a zesty touch to tacos, salads, sandwiches, or grilled meats.
Get the recipe: Pickled Red Onions
7.Caramelised onion and goat’s cheese mushrooms
These bite-sized stuffed mushrooms are filled with a savory mixture of caramelized onions, garlic, and cheese. The earthy flavor of the mushrooms pairs wonderfully with the sweet, rich onions and melty cheese. These stuffed mushrooms are perfect for serving as an appetizer or a side dish at any gathering or holiday meal. Get the recipe:Caramelised onion and goat’s cheese mushrooms
8. Onion and Potato Frittata
This savory frittata is packed with the comforting flavors of sautéed onions and potatoes, baked together with eggs and cheese. The onions become soft and sweet as they cook, blending beautifully with the creamy potatoes and rich eggs. Perfect for brunch or a light dinner, this frittata is a great way to enjoy the humble onion in a more substantial dish. Get the recipe: Onion and Potato Frittata
9. Garlic Roasted Carrots
These roasted carrots are seasoned with garlic, onions, and a touch of honey, creating a sweet-savory combination that’s both vibrant and full of flavor. The onions and garlic infuse the carrots with depth, while the honey adds a gentle sweetness that caramelizes during roasting. This side dish pairs well with almost any main course, adding both flavor and color to your meal. Get the recipe: Garlic Roasted Carrots
10. Onion Bhaji (Indian Onion Fritters)
A popular Indian appetizer, onion bhajis are deep-fried fritters made with thinly sliced onions, chickpea flour, and spices like cumin, turmeric, and coriander. The result is a crunchy, savory, and slightly spiced snack or side dish. Serve these bhajis with a tangy chutney for the ultimate flavor experience. Get the recipe: Onion Bhaji (Indian Onion Fritters)
11. Creamy Spinach Dip
This creamy dip combines caramelized onions, fresh spinach, and a blend of cheeses for a savory, indulgent side dish that’s perfect for serving with crackers or vegetable sticks. The rich, creamy base is flavored with the sweetness of caramelized onions and the freshness of spinach, making it a crowd-pleasing appetizer or side dish. Get the recipe: Creamy Spinach Dip
12. Leek and Spring Onion Gratin
This savory gratin is made by layering thinly sliced onions and leeks with cream, cheese, and breadcrumbs, and then baking until golden and bubbly. The result is a creamy, rich, and flavorful side dish that’s perfect for serving with roasted meats or as part of a holiday feast. The onions and leeks become soft and caramelized, creating an irresistible texture and flavor. Get the recipe: Leek and Spring Onion Gratin
13. Sautéed Bell Peppers
This simple sauté brings together the natural sweetness of onions and bell peppers, cooked together in olive oil until tender and lightly caramelized. The dish is often seasoned with garlic, balsamic vinegar, and fresh herbs for added depth. It’s a great side dish to pair with grilled meats, roasted chicken, or as a topping for sandwiches and burgers. Get the recipe: Sautéed Bell Peppers
14. Onion Jam
Onion jam is a deliciously sweet and savory condiment made by slow-cooking onions with sugar, balsamic vinegar, and herbs. The result is a thick, syrupy jam that pairs wonderfully with cheese, roasted meats, or sandwiches. The sweetness of the onions is perfectly balanced by the acidity of the vinegar, making it a versatile and flavorful side dish or topping. Get the recipe: Onion Jam
These 14 savory onion side dishes are full of flavor and perfect for adding a savory twist to any meal. Onions can be prepared in a variety of ways—from sweet caramelized onions to tangy pickled varieties—and paired with different ingredients to create a wide range of textures and tastes. Whether you’re looking for a comforting dish like French onion gratin or something lighter like pickled onions, there’s an onion side dish for every occasion. Try incorporating these savory recipes into your next dinner and enjoy the rich, bold flavors they bring to the table!
