This Vegan Key Lime Tart is the perfect summer treat.
Bursting with zesty lime flavor, paired with a rich Vegan Graham Cracker Crust, this dish is sure to impress at your next gathering.
Similar to my Vegan Lemon Bars, this recipe is the perfect balance of tart and sweet.
For more easy vegan dessert recipes, try these Vegan Lemon Cookies or Vegan Lemon Poppy Seed Bread.
For more lime-inspired flavors, try this Vegan Chipotle Lime Aioli or Avocado Lime Crema.
Why You’ll Love This Recipe
- Easy – There is only about 15 minutes of hands-on work required for this recipe, the rest is baking or cooling time. If you can stir and pour, you can make this recipe.
- Perfect summer treat – This tart is packed with zesty lime, highlighting one of our favorite summer flavors.
Ingredients for Vegan Key Lime Tart
- Vegan Graham Cracker Crust – My Vegan Graham Cracker Crust is super easy to make, it comes together in just 10 minutes. You can use a store-bought pie crust instead. Any crust will work, but the rich graham cracker flavors really compliment the powerful lime.
- Lime Juice – Fresh lime juice is best, but bottled will work in a pinch.
- Sugar – A note about granulated sugar: Not all granulated sugar is vegan, make sure to choose a USDA Organic variety to ensure it is not processed with bone char, an animal ingredient.
- Corn starch – This acts as the thicker for this key lime tart and helps it to set when cooling.
- Oat Milk – Any plant milk will work to mellow the powerful flavor of the lime.
- Lime Zest – This is super important, especially if you are using bottled lime juice. You don’t want to miss out on any of that great lime flavor.
How to Make Vegan Key Lime Tart
Preheat your oven to 350 degrees Fahrenheit and make your Vegan Graham Cracker Crust.
First, mix the lime juice, oat milk, sugar, and corn starch in a COLD high-walled sauté pan until the corn starch is fully dissolved. If you try to heat the mixture before the corn starch has fully dissolved, it will become clumpy and you’ll have to strain out the clumps. Yuck.
Once the corn starch is fully dissolved, heat the mixture over medium to high heat. Stir constantly until the mixture thickens. The mixture is thick enough when it sticks to a silicone spatula when scooped. This usually takes about 10 minutes.
Pour the mixture into a prepared Graham Cracker Crust.
Bake at 350 degrees Fahrenheit for 15 minutes. The mixture should begin to bubble around the edges and the Graham Cracker Crust will reach a deep golden-brown.
Let cool at least 30 minutes at room temperature or in the refrigerator. Slice, serve, and enjoy!
How to Store Vegan Key Lime Tart
- Fridge: Leftovers will store in the refrigerator for 3-5 days in an air-tight container.
More Tips for Making Vegan Key Lime Tart
- Not Vegan? Use dairy milk instead of oat milk. Use butter instead of oil when making the crust.
- Gluten-free? Use a pre-made gluten-free crust or swap for Gluten-Free Graham crackers when making your crust.
Vegan Key Lime Tart with Graham Cracker Crust
Ingredients
- 1 Graham cracker crust
- 1 cup lime juice
- 1.5 cup sugar*
- 6 tbsp cornstarch
- 1 cup oat milk
- zest of one large lime
Instructions
- Preheat your oven to 350 degrees Fahrenheit and make your Vegan Graham Cracker Crust.
- mix the lime juice, oat milk, sugar, and corn starch in a COLD high-walled sauté pan until the corn starch is fully dissolved.
- Heat the mixture over medium to high heat. Stir constantly until the mixture thickens. The mixture is thick enough when it sticks to a silicone spatula when scooped. This usually takes about 10 minutes.
- Pour the mixture into a prepared Graham Cracker Crust.
- Bake at 350 degrees Fahrenheit for 15 minutes.
- Let cool at least 30 minutes at room temperature or in the refrigerator.
- Slice, serve, and enjoy!
Notes
- Not Vegan? Use dairy milk instead of oat milk. Use butter instead of oil when making the crust.
- Gluten-free? Use a pre-made gluten-free crust or swap for Gluten-Free Graham crackers when making your crust.
Nutrition
Please note, while all ingredients used in this recipe have been verified to be vegan and free of applicable allergens at the time of recipe creation, different brands may differ in their ingredients or processing procedures and may change their ingredients at any time. For some recipes, I do include ingredients that are processed in a facility that processes other allergens. Please make sure to check the ingredients and processing procedures for your specific purchases to ensure they meet your dietary needs.
Last Updated on February 14, 2025
This recipe is so easy and so delicious! The graham cracker crust is the perfect texture!
This looks yummy will need to try making this with coconut sugar as I cant have normal sugars
What a great idea! Let me know how it turns out!