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    Home > Blog > Protein Desserts > Protein Brownies and Bars

    Protein Lemon Bars

    Updated: Sep 16, 2022 · Published: Mar 25, 2015 · By Andréa Marchese · This post may contain affiliate links · Leave a Comment

    Jump to Recipe Print Recipe

    If I make springtime recipes, the warm weather will come, right? So here you have Protein Lemon Bars! Tangy and sweet high-protein deliciousness!

    stack of protein lemon bars dusted with confectioners erythritol and a quarter of a lemon slice on top all on a white plate with a light background
    Protein Lemon Bars

    When I started looking around for sugar-free and gluten-free lemon bar recipes, I found this one that calls for a whole lemon. A whole lemon! Of course I was intrigued, so I adapted that filling recipe. I just purchased this Nutri Ninja high-powered blender, and I couldn't wait to see it in action. It did not disappoint!

    freshly cut protein lemon bars on a sheet of parchment paper with confectioners erythritol dusting on top

     

    Protein Lemon Bars

    I originally made these with a protein that is now discontinued, but this vanilla whey would work well also.

    For the powdered sugar topping, I used this confectioner's style erythritol. It's my new favorite thing! :) I also used it in the base and filling, although other sweeteners would be fine there. I just like to keep the list of ingredients short to make things easier.

    These Protein Lemon Bars are delicious, and you must try them! Really! I'm usually a chocolate dessert kind of girl, but when you use fresh delicious ingredients, you really do get incredible results. Give this recipe a try!

    stack of protein lemon bars dusted with confectioners erythritol and a quarter of a lemon slice on top all on a white plate with a light background

    Protein Lemon Bars

    Makes 9 bars.
    Print Recipe Pin Recipe Rate Recipe
    Prep Time: 20 minutes
    Cook Time: 24 minutes
    Total Time: 44 minutes
    Servings: 9 lemon bars
    Calories: 109kcal
    Author: Andréa

    Ingredients

    Best if ingredients are at room temperature.

      Base:

      • ¼ cup unsweetened applesauce 56g
      • 1 tablespoon coconut oil warmed to liquid (14g or 15ml)
      • 1 tablespoon coconut flour 7g
      • ½ cup natural vanilla whey protein 51g
      • 2 teaspoons confectioners style erythritol 10g

      Filling:

      • 1 large whole organic lemon about 110g
      • ⅓ cup lemon juice juice of about 2 more lemons (80ml)
      • 2 tablespoons confectioners style erythritol 30g
      • 2 whole large eggs 100g
      • ¼ cup natural vanilla whey protein 26g
      • 1 tablespoon arrowroot powder 8g
      • 2 tablespoons coconut oil warmed to liquid (28g or 30ml)

      Topping:

      • confectioners style erythritol

      Instructions

      • Preheat oven to 325F (163C).
      • Line a 7" square (or similarly sized) pan with parchment paper (if not using a silicone pan).
      • Mix applesauce and coconut oil until well combined.
      • Mix in remaining ingredients for the base and mix until smooth.
      • Spoon into parchment-lined pan, and spread it evenly.
      • Bake for about 14 minutes, until almost baked and firm.
      • Meanwhile, cut the ends off the whole lemon and throw them away.
      • Cut the rest of the lemon into chunks and take out any seeds.
      • In a high-powered blender or food processor, blend the lemon chunks with the lemon juice until smooth (or not, lemon bits are ok!)
      • Add remaining filling ingredients and blend to combine.
      • Remove the pan from the oven (when base is ready) and pour filling mixture on top.
      • Lower the oven temperature to 300F (150C), and bake for about 8 minutes. Check to see if the filling has stopped jiggling. If not, check every 1-2 minutes.
      • Let cool at room temperature, and then let cool completely in the refrigerator.
      • Top with some additional confectioner's style erythritol, and enjoy!

      Notes

      A note about substitutions: because each type of protein powder has a distinct flavor and texture when baked, I would not try substituting different types of protein powders in this recipe. (See my Recipe Basics video for examples of what goes wrong when you use the wrong protein powder.)
      Also, the arrowroot powder is there as a thickener. I would not recommend omitting it, although I haven't tried the recipe without it.

      Nutrition

      Serving: 1g | Calories: 109kcal | Carbohydrates: 6g | Protein: 7g | Fat: 7g | Fiber: 1g | Sugar: 2g
      Tried this recipe?Mention and tag us! @proteincakery

      More Protein Brownie and Bar Recipes

      • Apple Pie Protein Bars
      • Pecan Protein Bites
      • Healthy Pumpkin Pie Bars
      • Healthy Cheesecake Brownies

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      andrea at the gym holding cupcakes

      Hi, I'm Andréa! I love baking, coffee, and leg day. Baking with protein powder has helped me develop healthy habits and overcome disordered eating, and I love sharing the recipes I've created.

      More about me →

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