Side Dishes
This vegan sweet potato quiche delivers the perfect balance of flaky crust and spiced filling without a single egg or dairy product. The secret lies in a flax egg mixture that binds the filling while keeping it light and creamy—no one will guess it's plant-based.
I've tested countless variations, and this recipe consistently delivers that golden-brown crust and tender, slightly caramelized sweet potato filling that tastes like comfort food reimagined.
The foundation starts with a crispy vegan pie crust that holds its shape while baking, thanks to a combination of cold butter substitutes and proper blind-baking technique. Inside, roasted sweet potatoes lend natural sweetness and texture, while aromatic spices like cinnamon and nutmeg create warmth that rivals traditional quiche flavors.
The filling stays moist without being soggy, thanks to a clever cornstarch slurry that thickens beautifully during baking.
What you'll end up with is a quiche that's rich, satisfying, and perfectly balanced—the crust remains crispy at the edges while staying tender underneath, and the filling has just the right amount of spice to complement its natural sweetness.
This recipe proves plant-based baking can deliver restaurant-quality results at home, with no compromises on texture or flavor.
The best part? It's ready in under an hour, making it ideal for brunch gatherings, potlucks, or even a special weeknight dinner. The instructions walk you through every step, from preparing the crust to assembling and baking the filling, with professional tips to ensure success every time.
Let's get started on creating this vegan masterpiece.
Ingredients for vegan sweet potato quiche
Six ingredients for the crust, eight for the filling—just enough to deliver restaurant-quality vegan quiche magic.
| Ingredient | Amount | Notes |
|---|---|---|
| Sweet Potatoes 🍠 | 2 medium | Peeled, diced into 0.5-inch cubes |
| Vegan Butter Substitute 🧈 | ¾ cup | Cold, vegan-certified (e.g., Miyoko's) |
| All-Purpose Flour 🌾 | 2 cups | Plus 1 tbsp for dusting |
| Ice Water 💧 | ½ cup | For dough elasticity |
| Ground Flaxseed 🌾 | 2 tbsp | For flax egg mixture |
| Unsweetened Almond Milk 🥛 | ¼ cup | For flax egg mixture |
| Cornstarch 🌾 | 2 tbsp | For filling slurry |
| Unsweetened Soy Milk 🥛 | 1 cup | For filling base |
| Ground Cinnamon 🌿 | 1 ½ tsp | For warm spice |
| Ground Nutmeg 🌿 | ½ tsp | Freshly grated preferred |
| Diamond Crystal Kosher Salt 🧂 | 1 tsp | Plus extra for crust |
| Black Pepper 🌶️ | ½ tsp | Freshly cracked |
| Nutritional Yeast 🧀 | 2 tbsp | For cheesy flavor |
| Extra-Virgin Olive Oil 🫒 | 1 tbsp | For crust brushing |
The crust begins with vegan butter substitute—Miyoko's or Earth Balance are excellent choices, but any cold, firm plant-based butter works. Whole Foods or Trader Joe's carry reliable options, and the key is keeping it chilled until ready to use. For flour, King Arthur or Bob's Red Mill brands yield consistent results, and always measure by weight if possible for precision. The sweet potatoes should be firm and vibrant—avoid any with soft spots or sprouting eyes, as these indicate starchy rather than sweet varieties. Yukon Golds are ideal, but any orange-fleshed sweet potato will work.
No flaxseed? Chia seeds at the same ratio create an equally effective binder, though the texture may be slightly firmer. Substituting soy milk for almond in the filling is perfectly fine, though the latter adds a subtle richness. Cornstarch is non-negotiable for the slurry—arrowroot won't provide the same thickening power. For the spices, Penzeys offers premium ground cinnamon and nutmeg, but regular grocery store brands work well if fresh. The nutritional yeast can be omitted entirely if avoiding all fortified ingredients, though it adds that signature umami depth. Pre-made vegan crusts exist, but homemade delivers superior flakiness—worth the extra 20 minutes.
Store crust components separately in airtight containers for up to 5 days, or freeze the dough for 3 months wrapped tightly. The filling keeps 4 days refrigerated, though it's best enjoyed within 2 days of baking for optimal texture. For make-ahead convenience, blind-bake the crust the day before—it reheats beautifully in a 350°F oven for 10 minutes before adding the filling. Leftovers reheat well, but the crust loses crispness—always serve fresh-baked whenever possible.
Why You'll Love This Recipe
- Sweet Potato Magic: I swear by roasting those sweet potatoes first—they caramelize into something buttery and deep, even without dairy. That flax "egg" binds it all together without tasting like anything but comfort.
- One-Bowl Wonder: Five ingredients, one bowl (plus a pie dish). The flour, vegan butter, and ice water make a crust that’s actually crispy—no fancy rolling or chilling required. My lazy Sundays just got an upgrade.
- Breakfast or Dinner: Serve it warm with a side salad for brunch, or cold with avocado for a packed lunch. The sweet potatoes keep it hearty enough to satisfy dinner cravings, but the flax egg gives it that light, fluffy texture.
- Budget-Friendly Leftovers: Sweet potatoes are cheap, and this recipe stretches easily for four servings. I make a double batch, slice it up, and freeze half—reheating it later is just minutes in the oven. No sad, dry quiche here.
Step-by-step instructions for vegan sweet potato quiche
Master the art of flaky crusts and rich fillings with this precise method.
Prepare the Flax Egg Mixture and Sweet Potato Filling
In a small bowl, whisk together the 2 tablespoons ground flaxseed and 0.25 cup unsweetened almond milk. Let this mixture sit for 5 minutes until it thickens into a gel-like consistency—this is your flax egg substitute. Meanwhile, peel and dice the 2 medium sweet potatoes into 0.5-inch cubes. Spread them on a baking sheet and bake at 400°F for 15 minutes until just tender. You want them soft enough to mash but not falling apart.
While the sweet potatoes roast, combine the 1 cup unsweetened soy milk, 2 tablespoons cornstarch, 1.5 teaspoons ground cinnamon, 0.5 teaspoon ground nutmeg, 1 teaspoon Diamond Crystal kosher salt, and 0.5 teaspoon black pepper in a saucepan. Whisk over medium heat until thickened to a pudding-like consistency—about 3-4 minutes. This slurry will form the creamy base of your filling. Set aside to cool slightly.
Create the Flaky Vegan Crust
In a large bowl, cut the 0.75 cup cold vegan butter substitute into small cubes. Sprinkle over the 2 cups all-purpose flour plus 1 tablespoon for dusting, along with the 1 teaspoon Diamond Crystal kosher salt. Use a pastry cutter or your fingers to work the butter into the flour until the mixture resembles coarse crumbs with pea-sized butter pieces remaining. This texture is crucial for achieving a flaky crust.
Gradually add the 0.5 cup ice water, 1 tablespoon at a time, mixing gently with a fork or your hands until the dough just comes together. Avoid overmixing—handle the dough as little as possible to prevent gluten development. Shape into a disk, wrap in plastic, and chill in the refrigerator for at least 1 hour. This resting period allows the gluten to relax and the butter to firm up, ensuring layers of flakiness when baked.
Assemble and Bake the Quiche
Preheat your oven to 375°F. On a lightly floured surface, roll out the chilled dough to fit a 9-inch pie dish, about 1/8-inch thick. Transfer to the dish and press gently into the bottom and up the sides. Trim any excess dough, leaving a 1/2-inch overhang. Prick the bottom with a fork to prevent puffing. Line with parchment paper, fill with pie weights or dried beans, and bake for 15 minutes. Remove the weights and bake for an additional 5 minutes until the edges are just beginning to golden.
Reduce the oven temperature to 350°F. In a separate bowl, gently fold the roasted sweet potatoes into the cooled soy milk slurry, along with the 2 tablespoons nutritional yeast. Pour the filling into the pre-baked crust. Brush the crust edges with 1 tablespoon extra-virgin olive oil and sprinkle with a pinch of Diamond Crystal kosher salt for extra flavor. Bake for 30-35 minutes until the filling is set and the top is golden brown. The center should jiggle slightly but not be liquid when gently shaken.
Rest and Serve
Allow the quiche to cool for 10 minutes before slicing. This resting period ensures clean cuts and prevents the filling from oozing out. The crust should be crisp and flaky, with a tender, creamy filling that holds its shape. Serve warm or at room temperature, accompanied by a simple arugula salad or steamed green beans to balance the richness.
This quiche delivers on its promises: a flaky crust achieved through proper butter incorporation and chilling, and a rich, spiced filling with just the right texture—creamy yet firm. The nutritional yeast adds a subtle cheesy depth that complements the sweet potatoes beautifully, making this dish both satisfying and plant-based perfect.
Pro Tips For Making Vegan Sweet Potato Quiche
- Prep Sweet Potatoes Right: Roast them first—slice them thin (¼-inch thick) and toss with oil, salt, and a pinch of smoked paprika before baking at 400°F (200°C) for 20 minutes. Cold, caramelized slices mix better into the filling and won’t turn to mush when baking later.
- Chill the Dough: After rolling out your vegan butter crust, wrap it tightly and refrigerate for at least 30 minutes. I learned this the hard way—warm dough shrinks in the oven, leaving a sad, uneven edge. (Yes, even if you’re impatient like me.)
- Mix Flax Eggs Last: Whisk ground flaxseed with water first, then let it sit for 5 minutes to thicken before adding to the filling. Adding it wet to dry ingredients makes the batter gummy; this gives it time to bind properly.
- Blind-Bake the Crust: Prick the crust all over with a fork, line it with parchment, and fill with pie weights or dried beans. Bake at 375°F (190°C) for 12 minutes before adding filling. Skipping this step means a soggy bottom—trust me, it’s non-negotiable.
Regional styles of vegan sweet potato quiche
Southern Comfort Style
Inspired by Southern U.S. traditions, this version swaps the sweet potato filling for collard greens—sautéed with 1 diced onion, 2 minced garlic cloves, 1 tbsp apple cider vinegar, and ½ tsp smoked paprika before mixing into the filling.
Add ½ cup cooked black-eyed peas for texture, and top with ¼ cup vegan shredded cheddar (like Violife) before baking. The result is a hearty, slightly tangy quiche that feels like a Southern classic. 🌶️
French-Inspired Rustic
For a French twist, replace the sweet potatoes with roasted butternut squash (cubed and roasted at 400°F for 20 minutes) and infuse the filling with 1 tsp fresh thyme, ½ tsp ground cloves, and 1 tbsp maple syrup.
Use a whole-grain flour crust (replace ½ cup all-purpose flour with ½ cup whole-wheat flour) for a nutty depth. Finish with a drizzle of balsamic glaze before serving. This version feels elegant yet rustic, perfect for brunch gatherings. 🍷
Mexican-Inspired Spiced
Transform this quiche into a Mexican-inspired dish by adding 1 tsp ground cumin, ½ tsp chili powder, and ½ cup black beans (drained and rinsed) to the filling. Top with ¼ cup vegan sour cream (like Tofutti) and 2 tbsp chopped cilantro after baking.
Serve with salsa verde or guacamole for a fiesta-worthy meal. The spices create a warm, earthy flavor that pairs beautifully with the sweet potatoes. 🌮
Japanese-Inspired Miso
For an Asian-inspired twist, replace the cinnamon and nutmeg with 1 tbsp white miso paste and 1 tsp grated fresh ginger. Add ½ cup finely diced red bell pepper and 2 tbsp chopped scallions to the filling.
Use a sesame seed crust (mix 1 tbsp toasted sesame seeds into the dough) and garnish with extra sesame seeds and thinly sliced green onions after baking. This version balances sweet and umami, offering a unique flavor profile. 🍜
Italian Herb Crust
Give your crust an Italian flair by adding 1 tbsp dried oregano and 1 tsp dried basil to the flour mixture.
Replace the sweet potatoes with roasted zucchini and carrot (diced and roasted together at 400°F for 15 minutes) and add ½ cup vegan ricotta (like Tofu Ricotta) to the filling. Finish with a sprinkle of nutritional yeast and fresh basil for a bright, herby twist.
This version feels fresh and light, perfect for a summer brunch. 🌿
Nutrition facts
Frequently asked questions
Can I make this vegan quiche without a pie dish?
Yes! Use a 9-inch cast-iron skillet or ceramic baking dish instead. Line with parchment paper before adding the dough to prevent sticking. For extra flakiness, brush the crust edges with vegan butter substitute after blind-baking. The filling will still set beautifully in these alternatives.
Why did my crust turn out dense instead of flaky?
The most common causes are overmixing the dough or skipping the 1-hour chilling step. Use a pastry cutter for the butter, handle the dough minimally, and ensure your vegan butter stays cold. For extra flakiness, freeze the dough for 30 minutes before rolling. Warm butter or overworking the dough creates tough, dense crusts.
Can I substitute roasted sweet potatoes with boiled ones?
Boiled sweet potatoes work but won't be as flavorful or textured. For best results, roast them at 400°F for 15 minutes—this caramelizes their natural sugars and creates a tender yet firm texture. If using boiled, pat them completely dry and roast for 5 minutes to develop flavor before mixing into the filling.
How do I make this quiche ahead of time?
Assemble the quiche (without baking) and refrigerate for up to 24 hours. When ready to bake, blind-bake the crust for 10 minutes at 375°F, then add the filling and bake as directed. For leftovers, store in an airtight container for 4 days, but reheat only the filling (not the crust) to maintain crispness.
What's the best way to reheat slices?
Warm individual slices in a 350°F oven for 8-10 minutes on a baking sheet. For microwave reheating, cover with a damp paper towel and heat for 20-30 seconds—this prevents the crust from becoming soggy. The filling reheats beautifully while keeping the crust lightly crisp.