Yield: 8 servings
Prep time: 15 minutes
Chill time: 2–4 hours
Churning: 20–30 minutes
Total: About 3–5 hours, depending on your ice-cream maker
Ingredients
Blueberry mixture
1 cup (150 g) fresh or frozen blueberries
2 tbsp powdered allulose or erythritol
1 tbsp lemon juice
1 tsp lemon zest
1 tsp vanilla extract
Pinch of salt
Cream base
2 cups (480 ml) heavy whipping cream, cold
½ cup (115 g) mascarpone cheese, softened
⅓ cup (65–70 g) powdered allulose, or sweetener to taste
½ tsp vanilla extract
Pinch of salt
Optional for an even creamier texture:
1 tbsp vodka or neutral spirit — this helps keep homemade ice cream softer when frozen.
Instructions
1. Make the blueberry sauce.
Place blueberries, 2 tablespoons sweetener, lemon juice, lemon zest, and salt in a small saucepan.
Cook over medium-low heat for about 5–8 minutes, stirring occasionally, until the berries soften and release their juices.
Lightly mash some of the blueberries while leaving some pieces whole.
2. Cool the blueberries completely.
Remove from the heat and stir in 1 teaspoon vanilla. Transfer to a bowl and refrigerate until thoroughly chilled.
For an especially smooth ice cream, blend the cooled blueberry mixture before proceeding.
3. Prepare the mascarpone base.
In a large bowl, whisk the softened mascarpone, â…“ cup powdered sweetener, vanilla, and salt until smooth.
Don’t overbeat it—the goal is a creamy mixture without lumps.
4. Add the heavy cream.
Slowly pour in the cold heavy cream while whisking.
Continue whisking until the mixture becomes thick and creamy but not stiff like whipped cream.
5. Combine with blueberries.
Fold approximately two-thirds of the chilled blueberry mixture into the cream base.
For the beautiful purple color shown in the photo, blend the blueberry mixture more thoroughly into the base.
Reserve the remaining blueberry mixture for a swirl.
6. Churn.
Pour the mixture into your ice-cream maker and churn according to the manufacturer’s directions, usually around 20–30 minutes.
When the ice cream reaches a soft-serve consistency, fold in the reserved blueberry sauce.
7. Freeze.
Transfer to a freezer-safe container. Press parchment paper or plastic wrap directly against the surface to minimize ice crystals.
Freeze for 2–4 hours for a firm, scoopable texture.
If frozen overnight, allow it to sit at room temperature for approximately 10–15 minutes before scooping.
For the blueberry-and-cream look
Top each serving with:
Fresh blueberries
A few small pieces of blueberry ice cream
Fresh mint leaves
Optional tiny drizzle of melted sugar-free white chocolate
The berries in the photograph are also a nice garnish, but remember that additional blueberries will increase the carbohydrate count.
Nutrition Information
Estimated per 1/8 recipe:
Nutrient Approx. amount
Calories ~260 kcal
Total fat ~25 g
Saturated fat ~16 g
Protein ~2–3 g
Total carbohydrates ~5 g
Fiber ~0.5 g
Net carbs ~4.5 g
Sugars ~3–4 g
Added sugar 0 g*
*Assumes an allulose/erythritol-based sweetener with no added sugar. Exact nutrition varies by brands and the sweetener used.
Important: The blueberries naturally contain carbohydrates, so this isn’t carb-free. For strict keto diets, reduce the blueberries somewhat and use a low-carb sweetener.
Allergen & Dietary Information
Gluten-free: Yes, assuming all packaged ingredients are certified gluten-free.
Nut-free: Yes. There are no nuts in the recipe.
Peanut-free: Yes.
Egg-free: Yes.
Soy-free: Generally yes, but check packaged mascarpone and sweetener labels.
Dairy-free: No. Heavy cream and mascarpone contain dairy.
Vegetarian: Yes.
Vegan: No.
Keto: Potentially, in moderate portions, depending on your daily carbohydrate target and the sweetener used.
Added-sugar-free: Yes, when prepared with a suitable sugar-free sweetener.
Q&A
Q: Can I make this without an ice-cream maker?
Yes. Pour the mixture into a shallow freezer-safe container and freeze. Stir vigorously every 30–45 minutes for the first 2–3 hours to break up ice crystals, then allow it to freeze completely.
Q: Can I use frozen blueberries?
Absolutely. Frozen blueberries work very well and are often more economical.
Q: Can I use strawberries instead?
Yes. Strawberries, raspberries, or blackberries can replace some or all of the blueberries.
Q: Which sweetener is best?
Allulose generally produces the softest homemade ice cream. Erythritol works, but ice cream made with erythritol can become harder and may develop a slightly crystalline texture.
Q: Why add mascarpone?
It adds fat and creaminess while helping create a richer, smoother texture without needing egg yolks.
Q: Can I leave out the mascarpone?
Yes. Replace it with about ¼ cup additional heavy cream, although the finished ice cream won’t be quite as rich.
Q: Why is my ice cream rock-hard?
Homemade ice cream can freeze harder than commercial ice cream because it doesn’t contain the same stabilizers and sugars. Allulose, sufficient fat, and the optional small amount of vodka can help keep it scoopable.
Q: How long does it keep?
For the best texture and flavor, enjoy it within about 1–2 weeks in an airtight freezer container.
Q: Can I add nuts?
Yes. For a crunchy variation, fold in ¼ cup chopped toasted pecans, almonds, or walnuts during the final few minutes of churning. This will change the nutrition and allergen profile.
Q: Is it truly low-carb?
It is substantially lower in carbohydrates than conventional blueberry ice cream when made with a non-sugar sweetener, but it still contains naturally occurring carbohydrates from blueberries and dairy. Always calculate using the exact brands and quantities you use.
With years of experience in restaurant research and local SEO, Sara creates accurate, user-friendly guides that work for both people and search engines. Her goal is to help users go from search results to their nearest restaurant or menu choice with as few clicks as possible.
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