This is the kind of recipe that earns its place on a holiday table. Thin slices of sweet potatoes and russet potatoes are layered together, baked until tender, and infused with savory herbs for a dish that feels cozy, rich, and deeply satisfying without being heavy. A base layer of caramelized onions and creamy white beans carries flavor through every bite, making this feel substantial enough to stand on its own.
For a long time, I thought I didn't like sweet potatoes. My first exposure to them was the marshmallow-topped version, and between the sweetness and the texture, I was completely put off. It turns out the problem was never the sweet potato itself, it was how it was treated.
I love sweet potatoes when they're roasted, structured, and allowed to caramelize a little around the edges. This potato and sweet potato bake leans fully into that idea. It takes time, especially when you're caramelizing the onions and building the spiral, but the payoff is worth it. The final dish looks like a centerpiece, is vegetarian and vegan, and delivers real substance thanks to a base layer of beans and onions that carry flavor through every bite.
Ingredient Notes
Sweet Potatoes and Russet Potatoes - Using both creates contrast. Sweet potatoes bring gentle sweetness and color, while russets add structure and a more neutral, savory backbone.
Caramelized Onions - This is the foundation of the dish. Taking the time to cook the onions slowly gives you a savory sweetness that infuses the entire bake from the bottom up.
White Beans - The beans are layered whole over the caramelized onions and soften as they bake, creating a creamy base without losing their shape. Cannellini beans are especially smooth and mild, while butter beans are slightly larger with a richer, more buttery texture. Great Northern beans also work well and hold their structure nicely. This layer adds substance and protein, helping the dish feel satisfying rather than starchy.
Fresh Herbs and Nutmeg - Rosemary, thyme, and sage give this bake classic holiday flavor, while a small amount of nutmeg adds warmth without tipping the dish into sweet territory.
Instructions
Start by caramelizing the onions. Heat olive oil in a cast-iron skillet over medium-low heat, then add the sliced onions, salt, and red pepper flakes. Cook slowly, stirring occasionally, until the onions are deeply golden and reduced. This step takes time, but it's where much of the flavor is built.
Once the onions are caramelized, spread them evenly across the bottom of the skillet. Scatter the white beans in an even layer over the onions, leaving them whole to create a creamy, savory base as they warm and bake.
In a large bowl, toss the sliced sweet potatoes and russet potatoes with olive oil, salt, black pepper, nutmeg, and the finely chopped rosemary, thyme, and sage. Make sure the slices are evenly coated.
Arrange the potato slices vertically in the skillet, alternating between sweet potatoes and russets to form a spiral. Tuck the remaining whole herb sprigs between the slices so their aroma infuses the bake as it cooks.
Cover the skillet tightly and bake until the potatoes are tender. If your cast-iron skillet doesn't have a lid, a snug layer of foil works just as well. While the bake cooks, toast the panko breadcrumbs and chopped pecans in olive oil, stirring constantly until golden and fragrant.
Uncover the skillet, sprinkle the toasted pecan-panko topping evenly over the potatoes, and return it to the oven. Bake uncovered until the topping is crisp and the edges of the potatoes are lightly browned. Let the bake rest briefly before serving.
How to Serve
This dish is naturally vegan as written, making it an easy option for mixed holiday tables with different dietary needs.
- As a vegetarian centerpiece on a holiday table
- Alongside roasted poultry or fish for a mixed menu
- With a bright, acidic salad to balance the richness
- Leftover portions warmed and served over a bed of greens
Tips, Tricks, and Alterations
- You can caramelize the onions and toast the topping earlier in the day to break up the prep.
- Slice the potatoes evenly so they cook through at the same rate.
- Swap pecans for walnuts if needed.
This potato and sweet potato bake is the kind of dish that rewards care and intention. It's rich and cozy, layered with flavor, and designed for moments when you want something that feels special on the table. If you make it, I'd love to hear how you served it and how it fit into your holiday spread.
Recipe
Potato & Sweet Potato Bake with Caramelized Onions, Beans, and Toasted Pecan Topping
Ingredients
- 3 tablespoons olive oil
- 1 tablespoons olive oil
- 4 large yellow onions thinly sliced
- ½ teaspoon kosher salt
- ½ teaspoon kosher salt
- 1 teaspoon red pepper flakes
- 1 cup cooked white beans cannellini, butter beans, or Great Northern
- 2 medium sweet potatoes about 1 pound, peeled and thinly sliced (about ⅛-inch thick)
- 2 medium russet or Yukon Gold potatoes about 1 pound, peeled and thinly sliced (about ⅛-inch thick)
- 1 teaspoon freshly ground black pepper
- ¼ teaspoon freshly grated nutmeg or ground nutmeg
- 2 sprigs fresh rosemary
- 2 sprigs fresh thyme
- 2 sprigs fresh sage
- Toasted Pecan-Panko Topping
- ½ cup panko breadcrumbs
- ¼ cup finely chopped pecans
- 1 tablespoon olive oil
- Pinch of kosher salt
Instructions
- Preheat the oven to 375F (190C).
- Heat 3 tablespoons olive oil in a 10-inch cast-iron skillet over medium-low heat. Add the sliced onions, ½ teaspoon kosher salt, and red pepper flakes. Cook for 35-45 minutes, stirring occasionally, until the onions are deeply golden and significantly reduced. Spread evenly across the bottom of the skillet.3 tablespoons olive oil, 4 large yellow onions, ½ teaspoon kosher salt, 1 teaspoon red pepper flakes
- Scatter the white beans evenly over the caramelized onions, leaving them whole.1 cup cooked white beans
- Remove the leaves from one sprig each of the rosemary, thyme, and sage and finely chop. Leave the remaining sprigs whole.2 sprigs fresh rosemary, 2 sprigs fresh thyme, 2 sprigs fresh sage
- In a large bowl, combine the sliced sweet potatoes and russet potatoes with the remaining 1 tablespoon olive oil, remaining ½ teaspoon kosher salt, black pepper, nutmeg, and the chopped herbs. Toss gently until evenly coated.1 tablespoons olive oil, ½ teaspoon kosher salt, 2 medium sweet potatoes, 2 medium russet or Yukon Gold potatoes, 1 teaspoon freshly ground black pepper, ¼ teaspoon freshly grated nutmeg
- Arrange the potato slices vertically in the skillet over the bean layer, alternating sweet potatoes and russets to create a spiral pattern. Tuck the whole herb sprigs between slices.
- Cover the skillet tightly with a lid or foil and bake for 50 minutes, until the potatoes are tender when pierced with a knife.
- While the bake cooks, heat 1 tablespoon olive oil in a small skillet over medium heat. Add the panko breadcrumbs and chopped pecans. Toast, stirring constantly, until golden and fragrant. Season lightly with salt and remove from heat.½ cup panko breadcrumbs, ¼ cup finely chopped pecans, 1 tablespoon olive oil, Pinch of kosher salt
- Remove the foil or lid from the skillet and sprinkle the toasted pecan-panko topping evenly over the potatoes. Return the skillet to the oven and bake uncovered for 20-25 minutes, until the topping is crisp and the edges of the potatoes are golden.Toasted Pecan-Panko Topping
- Let rest for 10 minutes before serving. Remove and discard the whole herb sprigs. Serve warm.
Notes
The onions and topping can be prepared earlier in the day and added just before baking.
Leftovers reheat well and are especially good served warm over greens.
Slice the potatoes evenly for the most consistent texture.
Nutrition Disclaimer: Nutrition facts are calculated using an online tool and should be considered estimates.
Nutrition
Did you make this recipe? Let me know!