A five-inch springform is a small pan for a reason. It makes a cheesecake meant to be shared in thin wedges rather than carved from a deep nine-inch tin, and it leaves room for a layer most lemon cheesecakes do not have.
In this sugar-free no-bake lemon blueberry cheesecake, that extra layer is whole blueberries simmered with allulose and their own spoon of gelatin, piped between two layers of lemon filling. The purple stripe runs straight through the middle of the cake.
Nothing is baked. The almond crust presses straight into the pan and chills, the lemon filling sets with gelatin, and the whole thing is assembled cold in about 30 minutes before it spends six hours in the refrigerator.
Why You’ll Love This Sugar-Free No-Bake Lemon Blueberry Cheesecake
- A genuine middle layer. ¾ cup (120g) of whole blueberries simmered down and set with ⅓ tsp of gelatin, not a swirl.
- No oven. Sugar-free no-bake lemon blueberry cheesecake sets entirely in the refrigerator, on top of an almond crust that is pressed rather than baked.
- Real lemon. 2 tbsp (30g) fresh juice and 1 tsp (3g) finely grated zest, which is where most of the aroma lives.
- Small format. 8 wedges from a 5-inch pan, at about 130 calories and 4g net carbs each.
- Two gelatins, two jobs. 2 tsp (6g) sets the lemon filling and ⅓ tsp (1g) sets the blueberry layer on its own.
- Cuts cleanly. An acetate collar and a cold, clean knife are what stop the layers from dragging out of shape.
- Nothing to bake. Sugar-free no-bake lemon blueberry cheesecake never sees the oven, so it is a cool-weather recipe.
- Real lemon twice over. Zest for the aroma, juice for the sharpness, both measured separately in the card.
- Eight wedges, not twelve. The small pan gives sugar-free no-bake lemon blueberry cheesecake slices you can finish in one sitting.
Ingredient Notes
The crust is ⅓ cup (45g) roasted unsalted almonds, finely chopped, pressed into 2 tsp (10g) melted unsalted butter. It never sees the oven, so it only needs the 20 minutes in the refrigerator to firm up enough to hold the filling.
Chopped rather than blended is the detail that matters here. A blended almond paste spreads like a paste, while sugar-free no-bake lemon blueberry cheesecake needs a crumb base that stays put when the filling is pressed on top.
The lemon filling is 6 oz (170g) softened Philadelphia Neufchâtel, 1¼ cups (280g) FAGE Total 0% Greek yogurt, ⅓ cup (55g) powdered allulose, 2 tbsp (30g) fresh lemon juice and 1 tsp (3g) finely grated lemon zest. Use the Neufchâtel softened to room temperature, or the filling sets in streaks.
2 tsp (6g) unflavored gelatin bloomed in 2 tbsp (30g) cold water does the setting. Warm it gently and never let it boil, because boiled gelatin loses most of its setting power and you find out six hours later.
Tempering is the step people skip. Stirring two spoonfuls of filling into the warm gelatin first is what stops sugar-free no-bake lemon blueberry cheesecake from setting into streaks instead of one smooth slice.
The blueberry layer is ¾ cup (120g) fresh blueberries, 1 tbsp (12g) powdered allulose, 1 tbsp (15g) water, ⅓ tsp (1g) unflavored gelatin and 1 tsp (5g) cold water for blooming. Keeping most of the berries whole is what gives the stripe its texture instead of a smooth purple smear.
Allulose is a rare sugar the FDA allows manufacturers to leave off the total sugars and added sugars declarations on a Nutrition Facts label, and powdered is the right form for a filling this thick. When I want to confirm what an ingredient actually contributes, I work from USDA FoodData Central, the reference behind the gram weights in the card below.
How to Make Sugar-Free No-Bake Lemon Blueberry Cheesecake
Line the 5-inch springform with parchment, and add an acetate collar if you have one. Mix the chopped almonds with the melted butter and press it firmly into the bottom of the pan, then chill for 20 minutes.
Press the crust with the flat of a glass rather than the back of a spoon. Compact almond crumbs are what stop sugar-free no-bake lemon blueberry cheesecake from leaving half of its base stuck in the pan.
Simmer the blueberries with the 12g allulose and 15g water for 5 to 7 minutes, keeping most of the berries whole. Meanwhile bloom the 1g gelatin in the 5g cold water for 5 minutes, then stir it into the warm blueberries until dissolved and let the fruit cool completely.
Beat the Neufchâtel with the 55g powdered allulose until creamy, then gradually add the yogurt, lemon juice and zest. Bloom the 6g gelatin in the 30g cold water for 5 minutes and warm it gently until dissolved.
Temper the gelatin by stirring two spoonfuls of the cheesecake filling into it, then mix the loosened gelatin back into the remaining filling. Spread 45% of that filling over the chilled crust and chill 35 to 45 minutes, until it is lightly set.
Gently spread the cooled blueberries over the first layer with an offset spatula, taking care not to drag the lemon filling up into them. Chill 20 to 30 minutes, until the fruit layer has thickened.
Carefully spoon the remaining lemon filling over the blueberries and smooth the top without mixing the layers together. Cover the pan and refrigerate for at least 5 hours, preferably overnight.
Tap the springform gently on the counter to settle the top layer, then wipe the rim clean before the cover goes on. Squeezed-out filling around the edge is what makes the top layer of sugar-free no-bake lemon blueberry cheesecake slump on the plate.
Unmold while the cheesecake is cold and cut it into 8 wedges with a clean knife warmed in hot water and wiped dry between cuts. Wiping the blade is what keeps the lemon layer from frosting the cut face instead of showing a clean edge.
Success Tips
Keep most of the blueberries whole. Mashing them is tempting because it looks like more jam, but a sugar-free no-bake lemon blueberry cheesecake needs whole berries to keep its distinct middle stripe.
Use an offset spatula for the fruit layer rather than the back of a spoon. A spoon drags the lemon underneath, and the whole point of sugar-free no-bake lemon blueberry cheesecake is that the stripe stays narrow.
Cool the fruit completely before it touches the filling. Warm blueberries melt the lemon layer underneath, and the stripe ends up bleeding into the whole cake.
Dissolve the gelatin fully without boiling it. Both gelatins in this recipe are warmed gently and no further, because a boil is the fastest way to lose the set you have already waited hours for.
Chill overnight for clean slices. The 6-hour chill is what firms the top layer enough to hold a wedge shape, and a knife run through a softer cheesecake pulls the whole thing apart.
Storage
Refrigerate covered for up to 3 days, and keep it cold until shortly before you serve it. The gelatin sets the filling rather than the dairy, so it softens quickly at room temperature.
Cut the wedges while the cake is still in the pan if you can. An unmolded sugar-free no-bake lemon blueberry cheesecake has no sides to hold the slices, and it is much easier to lift one at a time from the springform.
FAQ
How is this different from lemon blueberry cheesecake lasagna?
This is a round layered cheesecake, not lasagna. The blueberry layer goes straight across the middle of a small springform instead of being spread sheet by sheet, and there is no pasta or biscuit layer anywhere in it.
The difference in the kitchen is just as clear. A lasagna takes a tray and a hot oven, while sugar-free no-bake lemon blueberry cheesecake is mixed cold in two bowls and assembled in the pan it is served from.
Do I need an acetate collar?
It helps, and it is optional. The parchment-lined springform works on its own, but a collar gives the sides of sugar-free no-bake lemon blueberry cheesecake enough support to unmold without slumping.
Why does the top layer sometimes look pale?
Because there is no baking to brown it, which is normal for a no-bake filling. It firms and turns creamy pale yellow once it has had the full chill, and the colour settles rather than changing.
Can I use frozen blueberries?
Fresh is what the card calls for, because frozen berries release a lot of water as they cook and can loosen the middle layer. If you use frozen, simmer them on their own first and reduce until they hold together.
Why does the blueberry layer bleed into the lemon?
Almost always because it went on warm. Chilling the first lemon layer and cooling the fruit completely are what keep sugar-free no-bake lemon blueberry cheesecake in three clean bands instead of one pale purple wash.
What else should I bake alongside it?
My Lemon Blueberry Cheesecake Lasagna is the layered sheet-pan version of the same lemon and blueberry pairing, if you want something to serve a crowd. My Sugar-Free Blueberry Lemon Crinkle Cookies use both flavours in a cookie, and my Sugar-Free Classic Cheesecake is the plain baked version to fall back on.
Sugar-Free No-Bake Lemon Blueberry Cheesecake
Ingredients
Equipment
Method
- Line springform pan with parchment. Use an acetate collar if available.
- Mix chopped almonds and butter. Press firmly into pan bottom. Chill 20 minutes.
- Simmer blueberries, 12g allulose and 15g water for 5–7 minutes, keeping most berries whole.
- Bloom 1g gelatin in 5g cold water for 5 minutes. Stir into warm blueberries until dissolved. Cool completely.
- Bloom 6g gelatin in 30g cold water for 5 minutes. Warm gently until dissolved.
- Beat Neufchâtel and 55g powdered allulose until creamy. Gradually add yogurt, lemon juice and zest.
- Temper dissolved gelatin with two spoonfuls of cheesecake filling, then mix into remaining filling.
- Spread 45% of cheesecake filling over crust. Chill 35–45 minutes until lightly set.
- Gently spread cooled blueberries over filling. Chill 20–30 minutes until thickened.
- Carefully spoon remaining cheesecake filling over blueberries. Smooth without mixing layers.
- Cover and refrigerate at least 5 hours, preferably overnight.
- Unmold while cold and cut into 8 wedges with a clean, warm knife.
Notes
- Keep most blueberries whole for a distinct purple layer.
- Cool fruit completely before assembly.
- Dissolve gelatin fully without boiling.
- Use softened Neufchâtel for silky filling.
- Chill overnight for clean slices.
- Refrigerate covered up to 3 days.