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Keto Lemon Blueberry Cheesecake Bars - Bright, Creamy, and Low-Carb

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Prep Time 20 minutes
Cook Time 30 minutes
Total Time 50 minutes
Servings: 16 servings
Ingredients Method

Ingredients
  

  • For the crust: Almond flour (2 cups, super-fine)
  • Unsalted butter (6 tbsp), melted
  • Granular erythritol or allulose (3 tbsp)
  • Vanilla extract (1 tsp)
  • Fine sea salt (1/4 tsp)
  • Optional: Lemon zest (1/2 tsp) for extra zing
  • For the cheesecake layer: Full-fat cream cheese (16 oz), softened
  • Powdered erythritol or powdered allulose (1/2–2/3 cup, to taste)
  • Large eggs (2), room temperature
  • Sour cream (1/2 cup) or full-fat Greek yogurt
  • Fresh lemon juice (2–3 tbsp)
  • Lemon zest (1–2 tsp), finely grated
  • Vanilla extract (1 tsp)
  • Pinch of salt
  • For the blueberry swirl/topping: Fresh or frozen blueberries (3/4–1 cup)
  • Lemon juice (1 tsp)
  • Powdered sweetener (1–2 tbsp), optional
  • Water (1–2 tsp), only if needed to loosen
  • To finish: Nonstick parchment paper for lining the pan

Method
 

  1. Prep the pan and oven: Heat oven to 325°F (163°C). Line an 8x8-inch square pan with parchment, leaving overhang for easy lifting.
  2. Mix the crust: In a bowl, stir almond flour, sweetener, salt, melted butter, vanilla, and optional zest until it looks like damp sand and holds when pressed.
  3. Press and pre-bake: Firmly press crust into an even layer in the pan. Bake 10–12 minutes until lightly golden at the edges. Cool 10 minutes.
  4. Soften the cream cheese: While the crust cools, beat cream cheese with a hand mixer on medium until smooth and fluffy, about 1–2 minutes. No lumps.
  5. Sweeten and flavor: Add powdered sweetener, lemon zest, vanilla, and salt. Beat until combined, scraping sides. Taste and adjust sweetness.
  6. Add eggs and sour cream: Beat in eggs one at a time on low speed until just combined. Mix in sour cream and lemon juice on low until smooth. Avoid overmixing.
  7. Make the blueberry swirl: Mash berries with lemon juice and optional sweetener. If using frozen, thaw first and drain extra liquid. You want a jammy texture.
  8. Assemble: Pour cheesecake batter over the cooled crust. Spoon small dollops of blueberry mixture across the top. Use a skewer or knife to gently swirl.
  9. Bake: Bake 28–35 minutes, until edges are set and the center wobbles slightly. Do not overbake; it will firm as it cools.
  10. Cool gradually: Turn off oven, crack the door, and let bars sit 10 minutes. Move pan to a rack and cool to room temp, 1–2 hours.
  11. Chill: Cover and refrigerate at least 4 hours, preferably overnight, to set and slice cleanly.
  12. Slice and serve: Lift out by the parchment. Use a sharp knife, wiping between cuts. Garnish with extra lemon zest or a few fresh berries if you like.