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+ servings
Stack of keto lemon bars with slice of lemon on top
Servings: 16 Bars

Keto Lemon Bars

4.45 from 29 votes
6-Ingredient Keto Lemon Bars with an almond flour shortbread crust and a custard lemon layer. These bright, tangy perfectly sweet sugar-free bars are loaded with flavor!
Prep Time: 10 minutes
Cook Time: 30 minutes
Total Time: 40 minutes

Ingredients

Lemon Bar Crust:

Lemon Filling:

Instructions

  • Preheat the oven to 350 degrees Fahrenheit and line a 9” x 9” baking pan with parchment paper.
  • Prepare the crust recipe by mixing all of the ingredients (melted butter, almond flour, sugar-free sweetener and sea salt), together in a large mixing bowl until a thick dough forms.
    A red mixing bowl filled with crumbly, light brown Keto Lemon Bars dough mixture, with part of a metal spoon visible in the upper right corner.
  • Transfer the dough to the parchment-lined pan, then use your hands to press it firmly into an even layer. Use a fork to poke several holes in the dough, which will allow the crust to bake evenly. Bake the crust on the center rack of the preheated oven for 12 to 15 minutes, or until golden-brown.
    A parchment-lined baking pan filled with unbaked dough, evenly pressed and pricked with a fork in a diagonal pattern—perfect as the base for keto lemon bars.
  • While the crust is baking, prepare the lemon bar filling. In a mixing bowl, whisk together the eggs, lemon juice and lemon zest.
    Wet ingredients for lemon filling in a mixing bowl
  • Stir in the sugar-free sweetener and almond flour until combined. Note: you can also perform this step using a food processor if you prefer.
    A metal mixing bowl filled with pale yellow batter, flecked with small bits for Keto Lemon Bars, with a metal spoon resting inside.
  • Once the crust is out of the oven, pour the lemon filling mixture over the crust. Bake the lemon bars for 15 to 18 minutes, until the filling appears set up but is still soft.
    Lemon bars fresh out of the oven
  • Remove the bars from the oven and allow them to cool on the counter completely before covering with plastic wrap and refrigerating for 2 hours. Once the bars have chilled in the refrigerator, tug on the parchment paper to transfer to a cutting board. Slice into bars, and enjoy!
    A close-up of a tray of Keto Lemon Bars cut into even squares shows a yellow, slightly textured top layer with tiny specks, all arranged on parchment paper.

Notes

*Depending on the brand of almond flour you use, you may need to add an additional 1/2 cup to 1 cup of almond flour to the crust mixture if it seems overly oily or wet. The consistency of the crust should be slightly crumbly and not overly oily.
Use maple sugar instead of sugar-free sweetener to make the bars paleo. You can also use regular granulated sugar.
Store any leftover keto lemon bars in an airtight container in the refrigerator for up to 7 days.

Nutrition

Serving: 1Bar (of 16), Calories: 176kcal, Carbohydrates: 6g, Protein: 8g, Fat: 13g, Fiber: 3g, Sugar: 2g
Course: Main Dishes
Cuisine: American
Keyword: almond flour shortbread crust, dairy free keto lemon bars, keto lemon bars, low carb lemon bars, low carb lemon bars recipe, sugar free lemon bars, sugar free lemon curd
Author: Julia