The first time I baked a Sweet Potato Quiche I remember the late autumn light through the kitchen window, the counter dusted with flour and the warm, orange scent of roasted sweet potato that filled the house as my family gathered around a cooling tart, it felt like a small celebration of ordinary evenings and the kind of dish you make when you want something pretty on the table and quietly nourishing at the same time.
Why You’ll Love It
This quiche balances silky egg custard with the caramel warmth of roasted sweet potato and a golden, flaky crust, it works for easy weekend brunches, a dressed-up weekday dinner, or sliced into boxes for a neighbor because it travels well and almost everyone I know loves the sweet savory contrast.
Serves 6
Prep Time: 25 minutes |
Cook Time: 45 minutes |
Total Time: 70 minutes
Ingredients
- 1 (9-inch) pie crust, store-bought or homemade, chilled
- 1 medium sweet potato (about 1 cup roasted cubes or 400 g peeled and cubed)
- 1 medium yellow onion, thinly sliced
- 1 tablespoon olive oil
- 1 tablespoon unsalted butter
- 4 large eggs
- 1 cup heavy cream
- 1/2 cup whole milk
- 1 cup grated Gruyere or sharp cheddar (about 100 g)
- 1 teaspoon fresh thyme leaves or 1/2 teaspoon dried thyme
- 1/2 teaspoon kosher salt
- 1/4 teaspoon black pepper
- Pinch of freshly grated nutmeg
Instructions
- Preheat the oven to 400°F (200°C). Toss the peeled and cubed sweet potato with a little oil, season with salt and roast on a sheet pan until tender and lightly browned, about 20 minutes, then cool slightly.
- While the sweet potato roasts, heat the olive oil and butter in a skillet over medium heat, add the sliced onion and cook gently until deeply golden and soft, about 12 to 15 minutes, then set aside to cool.
- Roll out the chilled pie crust into a 9-inch tart or pie pan, trim and crimp the edges, then blind bake the crust for 10 minutes with pie weights or dried beans, remove the weights and bake 5 more minutes until just set and lightly golden, lower oven to 350°F (175°C).
- In a mixing bowl whisk together the eggs, heavy cream, milk, thyme, salt, pepper, and nutmeg until smooth, stir in half the grated cheese.
- Layer the roasted sweet potato and caramelized onions evenly in the parbaked crust, pour the egg and cream mixture over the filling, scatter the remaining cheese on top.
- Bake at 350°F (175°C) for 35 to 40 minutes until the center is set but still slightly wobbly, a knife inserted near the center should come out mostly clean.
- Cool the quiche on a rack for 15 to 20 minutes to finish setting, garnish with a few extra thyme sprigs, then slice and serve warm or at room temperature.
Recipe Variations
- Crustless sweet potato quiche bake omit the crust, grease a 9-inch pie dish and reduce bake time by 5 to 10 minutes for a lighter, lower carb version.
- Goat cheese and herb swap Gruyere for crumbled goat cheese and add chopped rosemary and chives for a tangy, herb-forward flavor.
- Spiced maple twist add 1 tablespoon maple syrup and 1/2 teaspoon smoked paprika to the custard for a sweet smoky profile.
- Vegan version blend silken tofu with plant milk and a little nutritional yeast for a custardy base, use a dairy free crust and vegan cheese for a plant based quiche.
Make Ahead: Roast the sweet potatoes and caramelize the onions up to 3 days ahead and store them covered in the refrigerator, you can blind bake the crust and refrigerate it once cooled for up to 24 hours, assemble the quiche the next day then bake, baked quiche keeps well refrigerated for 3 days and rewarms gently in a 325°F oven.
Frequently Asked Questions
Can I use mashed sweet potato instead of roasted cubes in the quiche
Yes you can gently fold about 1 to 1 1/2 cups of mashed sweet potato into the custard for a smoother texture, reduce moisture by using slightly less milk to keep the filling from becoming too soft
How do I prevent the quiche from being soggy in the middle
Blind bake the crust until set, make sure roasted sweet potato pieces are well drained and not waterlogged, and bake until the center is mostly set with a slight wobble, resting off heat will finish the set
Can I freeze the quiche for later
You can freeze baked quiche wrapped tightly in plastic and foil for up to 2 months, thaw overnight in the refrigerator and reheat in a 325°F oven until warmed through
What cheese works best with sweet potato in a quiche
Gruyere, sharp cheddar, or a mild goat cheese all pair nicely; Gruyere melts well for a classic creamy texture while goat cheese adds tang
Sweet Potato Quiche
This quiche balances silky egg custard with the caramel warmth of roasted sweet potato and a golden, flaky crust, it works for easy weekend brunches, a dressed-up weekday dinner, or sliced into boxes for a neighbor because it travels well and almost everyone I know loves the sweet savory contrast.
Ingredients
- 1 (9-inch) pie crust, store-bought or homemade, chilled
- 1 medium sweet potato (about 1 cup roasted cubes or 400 g peeled and cubed)
- 1 medium yellow onion, thinly sliced
- 1 tablespoon olive oil
- 1 tablespoon unsalted butter
- 4 large eggs
- 1 cup heavy cream
- 1/2 cup whole milk
- 1 cup grated Gruyere or sharp cheddar (about 100 g)
- 1 teaspoon fresh thyme leaves or 1/2 teaspoon dried thyme
- 1/2 teaspoon kosher salt
- 1/4 teaspoon black pepper
- Pinch of freshly grated nutmeg
Instructions
- Preheat the oven to 400°F (200°C). Toss the peeled and cubed sweet potato with a little oil, season with salt and roast on a sheet pan until tender and lightly browned, about 20 minutes, then cool slightly.
- While the sweet potato roasts, heat the olive oil and butter in a skillet over medium heat, add the sliced onion and cook gently until deeply golden and soft, about 12 to 15 minutes, then set aside to cool.
- Roll out the chilled pie crust into a 9-inch tart or pie pan, trim and crimp the edges, then blind bake the crust for 10 minutes with pie weights or dried beans, remove the weights and bake 5 more minutes until just set and lightly golden, lower oven to 350°F (175°C).
- In a mixing bowl whisk together the eggs, heavy cream, milk, thyme, salt, pepper, and nutmeg until smooth, stir in half the grated cheese.
- Layer the roasted sweet potato and caramelized onions evenly in the parbaked crust, pour the egg and cream mixture over the filling, scatter the remaining cheese on top.
- Bake at 350°F (175°C) for 35 to 40 minutes until the center is set but still slightly wobbly, a knife inserted near the center should come out mostly clean.
- Cool the quiche on a rack for 15 to 20 minutes to finish setting, garnish with a few extra thyme sprigs, then slice and serve warm or at room temperature.
Conclusion
This Sweet Potato Quiche is the kind of recipe that photographs beautifully and sits comfortably in a real kitchen rotation, it combines simple techniques—roasting, caramelizing, blind baking—with a forgiving custard that rewards a little attention, so bake it when you want something that looks elegant but feels like home, and feel free to tweak the cheese, herbs, or sweetness until it becomes your signature slice.
