Coconut Flour Lemon Bars

These Coconut Flour Lemon Bars deliver all the bright, tangy satisfaction of classic lemon bars without the blood-sugar spike. A buttery, slightly nutty coconut flour crust forms the base, baked until just golden, then topped with a silky lemon curd made from fresh lemon juice, eggs, and erythritol instead of sugar. The result is a low-carb, low-glycemic dessert that still delivers that irresistible sweet-tart balance everyone loves. Coconut flour is naturally low in digestible carbohydrates and high in fiber, making it an excellent gluten-free alternative to traditional flour for those managing blood sugar. Erythritol, a sugar alcohol with minimal impact on blood glucose, sweetens the curd without the aftertaste of some other sugar substitutes. Together, these swaps create a dessert that's suitable for diabetics, prediabetics, and anyone watching their carb intake. Serve these chilled, dusted lightly with a bit of powdered erythritol if desired, and store leftovers in the fridge for a quick, guilt-free treat whenever a citrus craving strikes. They're perfect for potlucks, afternoon tea, or simply treating yourself without derailing your blood sugar goals.

Ingredients

• 0.5 cupCoconut flour, sifted
• 4 tbspunsalted butter, melted, or coconut oil for dairy-free
• 3 tbspGranular erythritol, for the crust
• 1 largeegg, for the crust
• 0.5 tspvanilla extract
• 0.25 tspsalt
• 4 largeegg, for the lemon curd filling
• 1 largeEgg yolk, for extra richness in the curd
• 0.75 cupGranular erythritol, for the filling, or more to taste
• 0.5 cupfresh lemon juice, about 3-4 lemons
• 1 tbsplemon zest
• 1 tbspCoconut flour, for thickening the curd
• 1 tbspPowdered erythritol, for dusting, optional

Method

1. Preheat the oven to 350°F (175°C). Line the baking pan with parchment paper, leaving an overhang on two sides for easy removal.
2. In a mixing bowl, whisk together the coconut flour, erythritol, and salt for the crust.
3. Add the melted butter, egg, and vanilla extract to the dry ingredients and stir until a soft, cohesive dough forms.
4. Press the dough evenly into the bottom of the prepared pan, forming a uniform crust layer.
5. Bake the crust until lightly golden at the edges. 12:00
6. While the crust bakes, zest the lemons to measure out the lemon zest for the filling.
7. In a saucepan off the heat, whisk together the eggs, egg yolk, erythritol, lemon juice, lemon zest, and coconut flour until smooth and well combined.
8. Place the saucepan over low-medium heat and cook, whisking constantly, until the mixture thickens into a curd that coats the back of a spoon. 8:00
9. Pour the hot curd through a fine mesh sieve directly onto the baked crust to remove any lumps, then spread it into an even layer.
10. Return the pan to the oven and bake until the filling is just set and no longer jiggly in the center. 15:00
11. Remove from the oven and let cool to room temperature, then refrigerate until fully chilled and set. 60:00
12. Lift the bars out using the parchment overhang, slice into 9 squares, and dust with powdered erythritol before serving if desired.