No Sugar High-Protein Vanilla Slice

This is our favourite BUT with NO SUGAR. You can have a big piece of the slice for your afternoon tea.
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Prep Time 30 minutes
Cook Time 15 minutes
Resting time 3 hours
Total Time 3 hours 45 minutes
Course Dessert
Cuisine French
Servings 8 servings
Calories 426 kcal


  • 2 Puff pastry


  • 80 g Erythritol Or other alternative sugar. eg Stevia
  • 2 tbsp Corn flour
  • ¼ tsp Salt
  • 15 g Gelatin 
  • 450 mL Unsweetened almond milk 
  • 2 Egg yolks
  • 50 g Protein powder
  • 1 tsp Vanilla extra
  • 2 tbsp Unsalted Butter


  • Ingredient Overview
  • Bake the puff pastry sheets according to package directions until puffed and golden. Allow cooling.
    2 Puff pastry
  • In a small bowl, whisk together the sweetener, cornstarch, protein powder and salt. Add it to a small saucepan and gently whisk in the almond milk until combined.
    80 g Erythritol, 2 tbsp Corn flour, ¼ tsp Salt, 450 mL Unsweetened almond milk , 50 g Protein powder
  • Place the saucepan over medium heat and bring it to a boil. Continue to whisk and let it boil for 1-2 minutes, before reducing the heat to low.
  • Gently scoop out half a cup of the mixture and add it to a bowl with the whisked egg yolks. Whisk very well, until combined. Add the egg yolk mixture to the hot mixture in the saucepan. Simmer for another 3 minutes, before removing from the heat.
    2 Egg yolks
  • Add the butter and the vanilla extract and gently whisk until combined.
    2 tbsp Unsalted Butter, 1 tsp Vanilla extra
  • Put the gelatin in a small bowl and add enough cold water to just cover. Whisk into a paste with a fork.
    15 g Gelatin 
  • Microwave for around 20 seconds to melt. Cool slightly, then add to the filling mixture and beat until smooth.
  • Place one of the pastry sheets into a perfectly fitting (25x25cm) square baking tin or dish lined with cling wrap. Pour in the filling, then top with the second pastry sheet. Refrigerate for a few hours until set.
  • Once set, carefully remove it from the dish and serve.


Calories: 426kcalCarbohydrates: 41gProtein: 12gFat: 29gSaturated Fat: 8gPolyunsaturated Fat: 4gMonounsaturated Fat: 15gTrans Fat: 0.1gCholesterol: 67mgSodium: 318mgPotassium: 63mgFiber: 1gSugar: 1gVitamin A: 170IUCalcium: 106mgIron: 2mg
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