Sugar-Free Irish Blackberry Fool

A fool is one of the simplest and prettiest desserts there is: soft whipped cream folded with stewed fruit until it is streaked with color. This Irish blackberry fool layers a jammy blackberry compote with a light cream made from whipped cream and Greek yogurt, swirled just enough to leave deep purple ribbons.

It is sugar-free and sweetened with allulose. Each of the 8 servings has about 105 calories and only 3g net carbs.

The compote cooks in about 10 minutes, the cream takes 5, and the blackberry fool only needs an hour in the fridge.

Why You’ll Love This Blackberry Fool

  • Only 6 ingredients. Blackberries, allulose, lemon, cream and Greek yogurt.
  • Light and airy. Greek yogurt lightens the whipped cream and adds protein.
  • Beautiful in a glass. Ivory cream and purple ribbons look elegant with no effort.
  • 105 calories per serving. With just 3g net carbs.

Ingredient Notes

Blackberries. Two cups of fresh blackberries make the compote. Keep 8 of the nicest berries aside to top each blackberry fool.

Allulose and lemon. A quarter cup of granulated allulose sweetens the compote and 1 tablespoon of fresh lemon juice brightens it. Powdered allulose sweetens the cream.

Cream and yogurt. Two-thirds of a cup of cold Good & Gather heavy whipping cream is whipped to soft peaks, then 1¼ cups of FAGE Total 0% plain Greek yogurt is folded in. This keeps the fool light and less rich than an all-cream version.

Allulose. Allulose is a rare sugar that the FDA allows to be excluded from the total sugars and added sugars declarations on the Nutrition Facts label.

If you want to check the nutrition of staples like blackberries and Greek yogurt yourself, you can look them up on USDA FoodData Central. Fruit and dairy contain natural sugars, and the nutrition is estimated from ingredient labels.

How to Make Blackberry Fool

You need a small saucepan, an electric hand mixer, mixing bowls and eight clear 4-fl-oz dessert coupes. Prep takes about 15 minutes, the compote cooks for 9 to 12 minutes, and the cooling and chilling take about 1½ hours.

Make the blackberry compote

Step 1. Reserve 8 whole blackberries. Place the remaining berries, granulated allulose and lemon juice in a small saucepan.

Step 2. Cook over medium-low heat for 9 to 12 minutes, stirring and gently crushing some of the berries, until thick and spoonable.

Thick blackberry compote simmering in a small saucepan
Cook the berries with allulose and lemon for 9 to 12 minutes until thick and jammy.

Step 3. Transfer the compote to a bowl and cool completely.

Make the light cream

Step 4. In a chilled bowl, beat the cold heavy cream with the powdered allulose until soft, fluffy peaks form.

Step 5. Stir the Greek yogurt until smooth, then gently fold it into the whipped cream in two additions, keeping it airy.

Greek yogurt being folded into whipped cream in a glass bowl
Fold the yogurt into the soft-peak cream in two additions to keep it airy.

Layer and chill

Step 6. Spoon a little compote into each coupe, add a generous spoonful of cream, then another small layer of compote.

Step 7. Repeat until evenly divided among the 8 coupes. Swirl the upper layers once or twice, leaving distinct purple ribbons.

Step 8. Finish each blackberry fool with a soft mound of cream, a little of the remaining compote and one whole blackberry.

Eight coupes of sugar-free blackberry fool with purple swirls
Layer compote and cream in 8 coupes, swirl gently and top each with a blackberry.

Step 9. Refrigerate for at least 1 hour before serving.

Success Tips for Blackberry Fool

Cool the compote completely. Warm compote melts the cream and the layers turn runny.

Whip only to soft peaks. The cream keeps thickening as you fold in the yogurt. Stiff peaks make it grainy.

Swirl just once or twice. Minimal swirling keeps the purple and ivory contrast that makes a blackberry fool so pretty.

Serve it the same day. It is at its best within a few hours, while the cream is still airy.

Serving Ideas

Serve it after a dinner party or a Sunday lunch. For a larger presentation, layer everything in one big glass serving bowl and let everyone help themselves.

More Sugar-Free Berry Desserts

For a warm berry dessert, try my sugar-free mixed berry cobbler. For another light, creamy dessert, the sugar-free Bavarian cream is elegant and easy.

And for a berry spread to keep in the fridge, make the sugar-free blueberry chia jam.

Storage

Blackberry fool is best enjoyed the day it is made. Leftovers keep covered in the fridge for up to 1 day, though the cream softens.

Blackberry Fool FAQ

What is a fool dessert?

A fool is a traditional British and Irish dessert of whipped cream folded with cooked or puréed fruit. The name is centuries old and simply means a light, simple treat.

Can I use frozen blackberries?

Yes. Cook them a few minutes longer so the extra water evaporates and the compote is thick and spoonable.

Can I make it ahead?

Make the compote up to 2 days ahead and keep it in the fridge. Whip the cream and assemble the blackberry fool on the day you serve it.

Why did my cream turn runny?

The compote was still warm or the cream was overmixed when folding in the yogurt. Fold gently and use completely cooled compote.

Is allulose a sugar alcohol?

No, allulose is a rare sugar, not a sugar alcohol.

Creamy, fruity and streaked with purple, this blackberry fool is the easiest elegant dessert you can make.

Sugar-free Irish blackberry fool with purple compote ribbons and a whole blackberry in a footed glass coupe

Sugar-Free Irish Blackberry Fool

A light Irish blackberry fool layering a jammy sugar-free blackberry compote with whipped cream and Greek yogurt, swirled into purple ribbons and topped with a whole blackberry.
Prep Time 15 minutes
Cook Time 12 minutes
Cool & Chill Time 1 hour 30 minutes
Total Time 1 hour 57 minutes
Servings: 8 servings
Calories: 105

Ingredients
  

Blackberry Compote
  • 2 cups fresh blackberries (288g; reserve 8 for topping)
  • ¼ cup granulated pure allulose (45g)
  • 1 tbsp fresh lemon juice (15g)
Light Cream
  • ⅔ cup Good & Gather Heavy Whipping Cream, cold (160g)
  • 1¼ cups FAGE Total 0% plain Greek yogurt (280g)
  • 2 tbsp powdered pure allulose (16g)

Equipment

  • Small saucepan
  • Electric hand mixer
  • Mixing bowls
  • Eight clear dessert coupes 4 fl oz each

Method
 

  1. Reserve 8 whole blackberries. Place remaining berries, granulated allulose, and lemon juice in a small saucepan.
  2. Cook over medium-low heat for 9–12 minutes, stirring and gently crushing some berries, until thick and spoonable.
  3. Transfer compote to a bowl and cool completely.
  4. In a chilled bowl, beat cold heavy cream with powdered allulose until soft, fluffy peaks form.
  5. Stir Greek yogurt until smooth. Gently fold into whipped cream in two additions, preserving its airy texture.
  6. Spoon a little blackberry compote into each dessert coupe. Add a generous spoonful of cream, followed by another small layer of compote.
  7. Repeat until evenly divided among 8 cups. Gently swirl the upper layers once or twice, leaving distinct purple ribbons.
  8. Finish each with a soft mound of cream, a little remaining compote, and one whole blackberry.
  9. Refrigerate at least 1 hour before serving.

Notes

Success Notes
  • Cool compote completely before layering.
  • Whip cream only to soft peaks.
  • Swirl minimally to preserve purple and ivory contrast.
  • For a larger photographed presentation, assemble multiple portions in one large glass serving bowl.
  • Best enjoyed the day it is made.
Nutrition per serving (8 servings): Calories ~105 | Net Carbs ~3g | Protein ~4g | Fat ~7g | Fiber ~2g | Total Carbs ~5g

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