Delicious Keto Blueberry and Lemon Custard Recipe: A Low-Carb Dessert Delight

Indulge in Keto Blueberry and Lemon Custard: A Tangy Delight

Welcome to a world where indulgence and health go hand in hand. If you’re on a ketogenic diet and yearning for a dessert that satisfies your sweet tooth without the guilt, our Keto Blueberry and Lemon Custard is your perfect match. This delightful concoction is a harmonious blend of tangy lemon and sweet blueberries, all wrapped up in a creamy custard that’s both low-carb and high-fat, adhering to your keto dietary needs.

Imagine the burst of fresh blueberries and the zest of lemon in every bite, creating a symphony of flavors that’s sure to please your palate. Not only is this dessert a treat for the taste buds, but it’s also packed with keto-friendly ingredients that will keep you on track with your health goals. Get ready to dive into a dessert that’s as nutritious as it is delicious!

Keto Blueberry and Lemon Custard

The Story Behind Keto Blueberry and Lemon Custard

As a passionate advocate for the ketogenic lifestyle, I’m always on the hunt for recipes that not only comply with the keto guidelines but also bring joy and excitement to the table. This Keto Blueberry and Lemon Custard is a personal favorite, born from the desire to create a dessert that’s both comforting and refreshing.

Why is this recipe such a stellar keto option? Let’s talk about the key ingredients. Blueberries, while containing natural sugars, are relatively low in carbs and high in fiber, making them a great fruit choice for a keto diet. They’re also rich in antioxidants, which are beneficial for overall health. Lemon zest and juice add a vibrant kick without adding extra carbs, and their high vitamin C content is an added bonus.

The use of granulated erythritol as a sweetener is a game-changer for those on a keto diet. It has zero calories, doesn’t spike blood sugar levels, and provides the sweetness needed without the carbs. Heavy cream brings in the necessary fats to keep you in ketosis, while providing a creamy, luxurious texture to the custard. Every ingredient is carefully selected to ensure you’re getting a dessert that’s not only scrumptious but also fully keto-compliant.

Fresh Ingredients for Keto Custard

Mastering the Method: Tips for Perfect Keto Custard

Creating the perfect custard is an art, and with a few chef’s tips, you’ll be crafting a masterpiece. Begin by preheating your oven to the right temperature; an accurate oven temperature is crucial for custards to cook evenly. When distributing the blueberries and lemon zest, ensure they’re spread out to get a bit of fruit in every spoonful.

When mixing the erythritol and eggs, whisk them until the mixture is light and frothy. This incorporates air and ensures your custard is light in texture. Pouring the heavy cream and lemon juice should be done slowly while whisking, to create a smooth, homogeneous mixture. Vanilla extract is the secret weapon here, adding depth to the custard’s flavor profile.

As you pour the custard over the blueberries, do so gently to prevent the berries from moving around too much. The baking process is where the magic happens; watch for the custard to set but still have a slight jiggle in the center. Cooling the custard slowly is vital to prevent cracks, so resist the temptation to rush this step. Patience will reward you with a smooth, crack-free surface.

Keto Blueberry and Lemon Custard Baking

Variation 1: Coconut Milk Keto Custard

For those looking for a dairy-free option, replace the heavy cream with full-fat coconut milk. This not only keeps the recipe keto-friendly but also adds a subtle tropical twist to the flavor. The coconut milk provides a similar richness and fat content, ensuring your custard remains creamy and indulgent.

Variation 2: Mixed Berry Keto Custard

Feel free to experiment with different low-carb berries such as raspberries or blackberries. A mixed berry custard offers a variety of flavors and an extra pop of color. Just be sure to keep an eye on the carb count, as it can vary with different types of berries.

Variation 3: Chocolate Chip Keto Custard

Add a handful of keto-friendly chocolate chips to the custard mixture for a chocolate chip twist. The chocolate chips will slightly melt into the custard, creating little pockets of chocolatey goodness that complement the blueberry and lemon flavors beautifully.

Substitutions for Keto Blueberry and Lemon Custard

While the recipe is designed to be keto-friendly, there are always options to tweak it according to your preferences or dietary restrictions. Here are some substitutions to consider:

Sweetener Substitution: If erythritol isn’t your preferred sweetener, you can opt for other keto-friendly sweeteners like stevia or monk fruit sweetener. Keep in mind that the sweetness level can vary, so adjust according to your taste.

Egg-Free Option: For those who can’t consume eggs, try using a combination of keto-friendly egg replacers. While the texture may vary, it’s possible to achieve a similar consistency with the right adjustments.

Flavor Variations: Not a fan of lemon? Substitute the lemon zest and juice with lime or orange for a different citrus note. Just be mindful of the carb content if you’re using orange.

Frequently Asked Questions

Q: Can I use frozen blueberries instead of fresh?
A: Yes, frozen blueberries can be used, but make sure to thaw and drain them well to prevent excess moisture from affecting the custard’s consistency.

Q: How do I know when the custard is set?
A: The custard is set when it’s firm around the edges but still has a slight jiggle in the center. It will continue to firm up as it cools.

Q: Can I make this custard ahead of time?
A: Absolutely! This custard can be made ahead and stored in the refrigerator for up to 3 days, making it a convenient dessert option.

Q: Is this custard suitable for freezing?
A: While you can freeze the custard, the texture may change upon thawing. For best results, enjoy it fresh or refrigerated.

Q: How can I prevent the custard from cracking?
A: Ensure a slow cooling process and avoid sudden temperature changes to prevent cracking. Also, avoid overbaking, as this can cause the custard to split.

Keto Blueberry and Lemon Custard

Indulge in a tangy and sweet symphony with this Keto Blueberry and Lemon Custard, a perfect low-carb dessert that marries the freshness of blueberries with the zesty burst of lemon.
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Prep Time 15 minutes
Cook Time 1 hour
Total Time 1 hour 15 minutes
Course Desserts
Cuisine American
Servings 6 servings
Calories 320 kcal


  • 9-inch (23 cm) pie dish
  • Medium mixing bowl
  • Whisk


  • 1 ½ cups fresh blueberries 170g
  • 1 tablespoon lemon zest 6g
  • 3 tablespoons lemon juice 45ml
  • ½ cup granulated erythritol 96g
  • ¼ teaspoon salt 1.5g
  • 5 large eggs
  • 1 ½ cups heavy cream 360ml
  • 1 teaspoon vanilla extract 5ml


  • Preheat your oven to 325°F (163°C) and lightly grease a 9-inch (23 cm) pie dish.
  • Evenly distribute the blueberries at the bottom of the greased pie dish and sprinkle the lemon zest over them.
  • In a medium mixing bowl, whisk together the granulated erythritol and salt.
  • Crack the eggs into the bowl and beat them with the erythritol mixture until fully combined.
  • Pour in the heavy cream and lemon juice, and add the vanilla extract. Whisk all the ingredients together until you achieve a smooth, well-incorporated mixture.
  • Gently pour the custard mixture over the blueberries in the pie dish.
  • Place the pie dish in the oven and bake for 50-60 minutes, or until the custard is set but still slightly jiggly in the center.
  • Remove from the oven and allow to cool to room temperature. Then, refrigerate the custard for at least 2 hours before serving to fully set.


The erythritol can be substituted with another keto-friendly sweetener if desired. Adjust to taste as sweetness levels may vary.
Ensure the custard is cooled slowly to prevent cracking.
This custard can be made ahead and stored in the refrigerator for up to 3 days.
For a dairy-free version, substitute heavy cream with full-fat coconut milk.


Calories: 320kcalCarbohydrates: 10gProtein: 7gFat: 28gFiber: 3gNet Carbs: 7g
Keyword Keto Blueberry Lemon Custard, Keto Lemon Custard, Low-Carb Blueberry Dessert
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