Vegan Sweet Potato Quiche Recipe: Crispy Lattice Crown Over Earthy Spiced Filling

This vegan sweet potato quiche delivers restaurant-quality texture with a crispy lattice crust and spiced filling that rivals traditional versions. 🌟 The secret lies in a flaxseed egg substitute that binds perfectly while keeping the quiche moist, paired with roasted sweet potatoes and aromatic spices for depth.

What sets this apart is how the lattice topping achieves that golden, shatteringly crisp finish—no butter or dairy required.

Unlike many vegan adaptations that compromise on texture, this recipe delivers a flaky crust and creamy filling that hold their own against classic quiches.

The filling gets its richness from coconut milk and nutritional yeast, while the crust benefits from a precise blend of flaxseed and cold water for optimal binding. Every bite combines tender sweet potato with the satisfying crunch of the lattice—proof that plant-based baking can achieve professional results.

Perfect for brunch gatherings or hearty weeknight dinners, this quiche pairs beautifully with a simple arugula salad or roasted Brussels sprouts. The lattice design not only looks impressive but also creates those coveted crispy edges while keeping the center tender.

With just 45 minutes in the oven, you'll have a showstopping dish that's as nutritious as it is delicious.

The beauty of this recipe lies in its versatility—swap in butternut squash for variety, or add smoked paprika for extra depth. The flaxseed egg substitute works equally well in other baked goods, making this a technique worth mastering. Let's get baking!

Ingredients for vegan sweet potato quiche

These carefully selected ingredients create a vegan quiche with restaurant-quality texture and flavor.

The sweet potatoes are the heart of this quiche, so choose firm, vibrant orange ones—no green spots or soft patches. Trader Joe's and Whole Foods carry excellent organic varieties, but any well-stocked grocery store will have good options. For the tofu, extra-firm is non-negotiable—it holds its shape during baking. Press it for 20 minutes before crumbling to remove excess moisture. The coconut milk should be full-fat for that creamy texture that mimics traditional quiche fillings. If you can't find full-fat, a blend of light and full-fat works, but the richness will be slightly reduced. Nutritional yeast is available in the health food section of most grocery stores—Bragg or Bob's Red Mill brands are widely available and consistently good quality.

No flaxseeds on hand? Chia seeds work at double the amount—just mix 6 tbsp chia with 9 tbsp water for three flax eggs. Swapping the sweet potatoes? Butternut squash or pumpkin puree works beautifully—adjust liquid ratios as needed. For extra depth, add smoked paprika or a pinch of turmeric to the filling. The crust can be made ahead and refrigerated for up to 2 days—just let it sit at room temperature for 30 minutes before rolling. If you prefer a more golden crust, brush it with a thin layer of apricot jam before baking instead of olive oil. The lattice design creates those coveted crispy edges while keeping the center tender—don't skip the chilling step before cutting into the dough.

This quiche reheats beautifully—350°F for 15 minutes restores the crispiness of the lattice. Store leftovers in an airtight container in the fridge for up to 4 days, or freeze portions for 3 months. The filling can be prepped ahead and baked later—just assemble the crust last. For serving, pair with a simple arugula salad or roasted Brussels sprouts to complement the earthy sweetness. The flaxseed egg substitute works equally well in other baked goods, so consider making extra for muffins or pancakes. The lattice topping can be adapted to other quiches—just adjust the dough ratio based on your filling size.

Step-by-step instructions for vegan sweet potato quiche

This method delivers a golden lattice crust and velvety sweet potato filling with perfect spice balance.

Preheat your oven to 375°F. In a large bowl, combine the 2 lb cubed sweet potatoes, 1 whole diced yellow onion, 4 minced garlic cloves, 1 tsp ground cinnamon, and 0.25 tsp ground nutmeg. Drizzle with 2 tbsp olive oil and toss until evenly coated.

Spread the mixture on a parchment-lined baking sheet and roast for 25-30 minutes until the sweet potatoes are tender and the edges begin to caramelize. You'll know it's ready when a knife slides in easily and the filling smells deeply aromatic. Let it cool completely before using—this prevents excess moisture in your quiche.

In a small bowl, whisk together the 3 tbsp ground flaxseeds with 9 tbsp cold water. Let it sit for 5 minutes until it thickens into a gel-like consistency. This acts as our egg substitute, binding the filling while adding richness.

In a separate mixing bowl, combine the 14 oz crumbled tofu, 1 can coconut milk, 0.5 cup nutritional yeast, 1.5 tsp salt, and 0.5 tsp black pepper. Stir until smooth, then add the flax egg mixture and mix thoroughly. Fold in the cooled roasted sweet potato mixture until fully incorporated.

In a food processor, pulse the 2 cups all-purpose flour with 0.25 cup olive oil and 0.75 cup cold water until a dough forms. Divide it into two equal portions. Roll one portion into a ¼-inch thick circle to fit your pie dish, pressing it gently into the bottom and up the sides.

Roll out the second portion into a ⅛-inch thick rectangle. Use a knife to cut a lattice pattern (cut strips ½-inch apart, then weave them at right angles). Place the lattice over the crust, leaving a ½-inch border around the edges. Brush the lattice with a little olive oil for extra crispiness.

Pour the sweet potato filling into the crust, spreading it evenly. Bake for 40-45 minutes until the crust is deep golden brown and the filling is set but still slightly jiggly in the center. The lattice should be crisp with just a hint of caramelization.

Let the quiche cool for 15 minutes before slicing—this allows the filling to set completely and prevents it from running. The crust should be sturdy enough to slice cleanly, while the filling remains creamy with pockets of sweet potato throughout. Serve warm or at room temperature for the best texture contrast.

Best sauces and condiments for this dish

Creamy Coconut Sauce

The filling's base is a rich coconut sauce made with 1 can full-fat coconut milk and 0.5 cup nutritional yeast, which gives that signature cheesy flavor without dairy. 🥥 For extra depth, I add 14 oz crumbled tofu—it mimics the protein texture of eggs while keeping the filling luscious.

If you want to make it even creamier, blend in 2 tbsp tahini after baking for a nutty twist.

Spiced Maple Glaze

After baking, drizzle the quiche with a spiced maple glaze made from 2 tbsp pure maple syrup, ½ tsp cinnamon, and a pinch of nutmeg. Brush it on while warm for a caramelized finish that balances the earthy sweet potatoes.

This adds a touch of sweetness that complements the savory filling beautifully. Store-bought maple syrup works, but Grade A dark amber has the best flavor.

Smoky Chipotle Aioli

For a smoky kick, whip up a quick chipotle aioli with ¼ cup vegan mayo, 1 tsp chipotle powder, and 1 tsp lime juice. Serve it on the side for dipping slices or dolloping over the quiche before serving.

The heat cuts through the richness, making each bite more dynamic. I like to use Hellmann's Vegan Mayo for the best texture.

Herbed Olive Oil

Infuse ¼ cup extra-virgin olive oil with 1 tbsp fresh thyme, 1 tbsp fresh rosemary, and a pinch of salt. Heat gently for 5 minutes, then strain and drizzle over warm slices.

The aromatic herbs elevate the earthy flavors of the sweet potatoes while adding a fresh contrast. This works beautifully as a finishing touch or for brushing the lattice before baking.

Frequently asked questions