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flatlay of rectangular key lime tart on grey surface.

Vegan Key Lime Tart (No-Bake)

5 from 1 vote
A no-bake, vegan-friendly version of a classic favourite. If you aren't able to find key limes (not typically found here in Ireland) don't worry as regular limes will work just fine. This tart is the perfect combination of refreshing and creamy so ticks all the boxes!
Prep Time 40 mins
Cook Time 6 hrs
Total Time 6 hrs 40 mins
Servings 15



  • 1 cup roasted buckwheat
  • 1 ½ cups cashews
  • 1 cup ground almonds
  • ¼ tsp Himalayan pink salt
  • 6 medjool dates pitted
  • 3 tbsp maple syrup
  • ½ tsp almond extract


  • 2 ½ cups cashews soaked in water for 4 hours and rinsed
  • cup maple syrup
  • ¾ cup coconut cream or oat cream
  • 4 key limes, juiced or 2 regular limes
  • 6 key limes, zest or 3 regular limes
  • 3 tbsp coconut butter
  • 1 tsp vanilla extract
  • ¼ tsp matcha powder (optional - for colour)


  • ½ can chickpea brine (aquafaba)
  • ½ tbsp cornstarch
  • ½ tsp cream of tartar
  • ½ cup caster sugar
  • ½ tsp vanilla extract
  • 1 lime, rind
  • Sprigs of fresh thyme


  • Add the roasted buckwheat to your food processor and blitz for a couple of minutes until roughly ground.
  • Add the cashews and blitz for another minute or so until the texture resembles a light crumb consistency.
  • Add the remaining base ingredients and continue to process until all the ingredients start to stick together to form a dough consistency.
  • Press the mixture evenly into your tart tin, making sure all the edges are evenly covered.
  • Set the base aside in the freezer to set.
  • Meanwhile add all the filling ingredients to your blender and blitz until completely smooth and creamy.
  • Remove the tart base from the freezer and fill with the key lime mixture (saving a cup for decorative piping).
  • Add the remainder of the filling to a piping bag and pipe your desired design on top of the tart.
  • Place the tart in the freezer to set for 6 hours.
  • Meanwhile prepare the meringues by preheating your oven to 100° C.
  • Add the aquafaba to a large bowl and beat using an electric whisk for a couple of minutes.
  • Add the sugar and vanilla extract and whisk for a further 10 minutes until the mixture forms stiff glossy peaks.
  • Line a baking tray with parchment paper and use a piping bag to pipe out the mixture into miniature meringues.
  • Bake in the oven for 1.5 to 2 hours before removing from the oven and allowing to cool completely before use. (hold aside some meringues for decorating the tart, any others can be stored at room temperature in an airtight container).
  • Once set, remove the tart from the tin and allow to defrost for one hour.
  • Decorate with mini meringues, lime rind and thyme leaves.


Calories: 420kcal | Carbohydrates: 45g | Protein: 10g | Fat: 25g | Saturated Fat: 7g | Polyunsaturated Fat: 3g | Monounsaturated Fat: 8g | Sodium: 46mg | Potassium: 446mg | Fiber: 5g | Sugar: 23g | Vitamin A: 27IU | Vitamin C: 6mg | Calcium: 57mg | Iron: 3mg
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