A Bright Tart for Everyone

I love a lemon tart with a silky filling and a crisp crust that lets the citrus flavor shine. This version is completely vegan, soy-free, and nut-free, making it easy to share with guests who have common dietary restrictions. It is one of my favorite Vegan Lemon Desserts for a fresh, elegant finish.

Silky, Tangy, and Allergy-Friendly

Oat milk creates a smooth base for the lemon filling, while cornstarch and agar help it set without eggs or dairy. The crust uses simple pantry ingredients and stays crisp beneath the creamy center. Vegan lemon tarts commonly use plant milk, lemon juice, cornstarch, and agar to create a firm, sliceable filling.vegkit+1

Ingredients

• 1½ cups all-purpose flour
• ¼ cup powdered sugar
• ¼ teaspoon fine sea salt
• ⅓ cup vegan butter
• 2 tablespoons cold water
• 1½ cups unsweetened oat milk
• ½ cup fresh lemon juice
• 1 tablespoon finely grated lemon zest
• ½ cup granulated sugar
• ¼ cup cornstarch
• 1½ teaspoons agar-agar powder
• 1 teaspoon vanilla extract
• ¼ teaspoon turmeric
• ½ cup fresh raspberries
• 1 tablespoon powdered sugar

Bake and Set

1. Preheat the oven to 350°F.
2. Grease a 9-inch tart pan with a removable bottom.
3. Whisk the flour, powdered sugar, and salt in a bowl.
4. Cut in the vegan butter until the mixture looks crumbly.
5. Add the cold water and mix until a dough forms.
6. Press the dough evenly into the tart pan.
7. Prick the bottom with a fork.
8. Chill the crust for 15 minutes.
9. Line the crust with parchment paper and pie weights.
10. Blind-bake for 15 minutes.
11. Remove the parchment and weights.
12. Bake for 5 more minutes.
13. Whisk the oat milk, lemon juice, lemon zest, sugar, cornstarch, agar, vanilla, and turmeric in a saucepan.
14. Cook over medium heat, whisking constantly.
15. Continue until the filling thickens.
16. Pour the filling into the baked crust.
17. Cool at room temperature for 1 hour.
18. Refrigerate for at least 4 hours.
19. Garnish with raspberries and powdered sugar.
20. Slice and serve chilled.

Easy Ways to Change It

• Use gluten-free flour for a gluten-free crust.
• Replace raspberries with blueberries or strawberries.
• Add poppy seeds to the filling.
• Use lemon zest curls as a garnish.
• Make six mini tarts instead of one large tart.
• Serve with coconut whipped cream.

Pro Tips

• Keep the vegan butter cold for a tender crust.
• Chill the pastry before blind-baking to reduce shrinking.
• Whisk the filling constantly to prevent lumps.
• Cook the filling until it visibly thickens before pouring.
• Let the tart chill fully before slicing.
• Check every packaged ingredient for soy and nut warnings if allergies are severe.

FAQs

Is this lemon tart completely nut-free and soy-free?
The recipe itself uses no nuts or soy, but packaged ingredients can carry cross-contact warnings. Check the labels on the vegan butter, oat milk, flour, and toppings when preparing the tart for someone with allergies.

Can I use a gluten-free crust?
Yes, use a reliable gluten-free flour blend designed for pastry. Follow the blend’s instructions if it requires xanthan gum or another binder.

What does agar-agar do in the filling?
Agar-agar helps the lemon filling set into a firm, sliceable layer without gelatin or eggs. It must be heated properly to activate, so keep whisking while the filling cooks.

Why is my filling still soft?
The tart may need more chilling time, or the agar may not have been heated enough. Refrigerate overnight if needed, and make sure the mixture reaches a gentle simmer before pouring it into the crust.

How should I store the tart?
Cover and refrigerate the tart for up to four days. Keep it chilled until serving because the filling softens at room temperature.

Vegan Soy-Free Nut-Free Lemon Tart

This bright vegan lemon tart features a crisp pastry crust and a silky, tangy lemon filling set with cornstarch and agar-agar. It is completely vegan, soy-free, and nut-free, making it an elegant option for guests with common dietary restrictions.

Print Recipe Pin Recipe

Prep Time 25 minutes mins

Cook Time 25 minutes mins

Chilling and Cooling Time 5 hours hrs 15 minutes mins

Total Time 6 hours hrs 5 minutes mins

Servings: 10 slices

Course: Dessert

Cuisine: American

Ingredients Equipment Method Notes

Ingredients

  

Vegan Tart Crust

• 1 1/2 cups all-purpose flour
• 1/4 cup powdered sugar
• 1/4 tsp fine sea salt
• 1/3 cup vegan butter cold
• 2 tbsp cold water

Lemon Filling

• 1 1/2 cups unsweetened oat milk
• 1/2 cup fresh lemon juice
• 1 tbsp finely grated lemon zest
• 1/2 cup granulated sugar
• 1/4 cup cornstarch
• 1 1/2 tsp agar-agar powder
• 1 tsp vanilla extract
• 1/4 tsp turmeric

Toppings

• 1/2 cup fresh raspberries
• 1 tbsp powdered sugar

Equipment

• 9-inch Tart Pan with Removable Bottom
• Mixing bowl
• Saucepan
• Whisk
• Parchment paper
• Pie Weights

Method

 

1. Preheat the oven to 350°F (175°C).
2. Grease a 9-inch tart pan with a removable bottom.
3. Whisk the flour, powdered sugar, and salt in a bowl.
4. Cut in the cold vegan butter until the mixture looks crumbly.
5. Add the cold water and mix until a dough forms.
6. Press the dough evenly into the tart pan and prick the bottom with a fork.
7. Chill the crust for 15 minutes.
8. Line the crust with parchment paper and pie weights.
9. Blind-bake for 15 minutes.
10. Remove the parchment and pie weights, then bake for 5 more minutes.
11. Whisk the oat milk, lemon juice, lemon zest, sugar, cornstarch, agar-agar, vanilla, and turmeric together in a saucepan.
12. Cook over medium heat, whisking constantly, until the filling visibly thickens and reaches a gentle simmer.
13. Pour the thickened lemon filling into the baked crust.
14. Cool the tart at room temperature for 1 hour.
15. Refrigerate for at least 4 hours.
16. Garnish with fresh raspberries and powdered sugar.
17. Slice and serve chilled.

Notes

Keep the vegan butter cold for a tender crust and chill the pastry before blind-baking to reduce shrinking. Whisk the filling constantly and cook it until visibly thickened to prevent lumps and ensure the agar activates properly. Chill the tart fully before slicing. For variations, use a gluten-free pastry blend, substitute blueberries or strawberries for raspberries, add poppy seeds, or make mini tarts. For severe allergies, check packaged ingredients for soy and nut cross-contact warnings. Store covered in the refrigerator for up to four days and keep chilled until serving.

A Fresh Citrus Finish

This soy-free, nut-free vegan lemon tart is bright, smooth, and easy to share. The crisp crust supports a silky lemon center that feels elegant without using eggs, dairy, nuts, or soy. It is a beautiful option for vegan desserts, allergy-aware baking, and healthy sweet treats. Slice it cold and let the fresh lemon flavor take center stage.

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