If you’re on a keto diet, you might think that traditional desserts are off-limits. But fear not! This Keto Boston Cream Pie is not only low in carbs but also rich, creamy, and utterly delicious. Imagine sinking your fork into a moist almond flour cake layered with velvety keto custard and topped with luscious keto frosting. It’s a treat that will satisfy your sweet tooth without derailing your diet. Let’s dive into this delightful recipe and create a dessert that everyone will love, keto or not!
What You’ll Love About This Recipe

- Low in carbohydrates, making it perfect for a keto lifestyle.
- Rich in flavor and texture, reminiscent of the classic Boston cream pie.
- Easy to make with simple ingredients you probably already have in your pantry.
- Can be made ahead of time for gatherings and celebrations.
- Perfect for satisfying your sweet cravings without the guilt.
What You’ll Gather

- 8 large eggs: The foundation for our cake, providing structure and richness.
- 1/4 cup coconut oil, melted: Adds moisture and a hint of tropical flavor.
- 1 tablespoon vanilla extract: For that warm, sweet aroma.
- 1 cup allulose: A fantastic sugar substitute that keeps the carbs low.
- 4 cups almond flour: The base of our keto cake, providing a nutty flavor and texture.
- 2 teaspoons baking powder: Helps the cake rise and become fluffy.
- 1 batch keto custard: Creamy and rich, this filling brings the pie together.
- 1 cup keto frosting: The perfect topping to finish this pie off deliciously.
Appliances & Accessories

- Mixing bowls: For combining your ingredients.
- Electric mixer: A hand-held or stand mixer will help you achieve fluffy eggs and batter.
- Oven: Essential for baking your cake layers to perfection.
- 9-inch round cake pans: To bake your cake layers evenly.
- Spatula: For spreading the custard and frosting smoothly.
Keto Boston Cream Pie in Steps
Step 1: Preheat the Oven
Preheat your oven to 350°F (175°C). This ensures that your cake bakes evenly and achieves that perfect golden brown color.
Step 2: Prepare the Cake Batter
In a large mixing bowl, beat the 8 large eggs until they are light and frothy. Gradually add in the melted coconut oil, vanilla extract, and allulose. Mix until well combined. In a separate bowl, whisk together the almond flour and baking powder. Slowly add the dry ingredients to the wet mixture, stirring until just combined.
Step 3: Bake the Cake Layers
Divide the batter evenly between two 9-inch round cake pans. Smooth the tops with a spatula and bake for 25-30 minutes, or until a toothpick inserted in the center comes out clean. Allow the cakes to cool in the pans for about 10 minutes before transferring them to a wire rack to cool completely.
Step 4: Make the Keto Custard
While the cake layers are cooling, prepare your keto custard according to your favorite recipe. Make sure it’s thick and creamy for the best results.
Step 5: Assemble the Pie
Once the cake layers are completely cool, place one layer on a serving plate. Spread the keto custard evenly over the top. Carefully place the second cake layer on top of the custard.
Step 6: Frost the Cake
Spread the keto frosting over the top of the second cake layer. Make sure to cover it generously for that classic Boston cream pie look.
Step 7: Chill and Serve
For the best flavor and texture, chill the assembled Keto Boston Cream Pie in the refrigerator for at least an hour before slicing. This will allow the custard to set and the flavors to meld beautifully.
Make It Diet-Friendly
- Use a sugar-free or low-carb frosting to keep the carbs in check.
- Opt for unsweetened coconut cream instead of traditional frosting for a lighter option.
- Experiment with flavored extracts, like almond or coconut, to add unique flavors to the cake or custard.
- Consider adding a layer of fresh berries for a fruity twist while keeping it keto.
Mistakes That Ruin Keto Boston Cream Pie
- Not allowing the cake layers to cool completely before assembling can lead to a soggy pie.
- Using too much liquid in the custard can result in a runny filling.
- Overmixing the batter can lead to a dense cake instead of a light and fluffy one.
- Skipping the chilling step can prevent the custard from setting properly.
Keep It Fresh: Storage Guide
To keep your Keto Boston Cream Pie fresh, store it in an airtight container in the refrigerator. It should last for up to 5 days, but trust us, it probably won’t last that long! If you want to make it ahead of time, you can also freeze the cake layers separately. Just make sure they are well-wrapped to prevent freezer burn.
Common Qs About Keto Boston Cream Pie
Can I use a different sweetener instead of allulose?
Yes, you can substitute allulose with erythritol or monk fruit sweetener. Just be mindful of the sweetness level, as some sweeteners may be sweeter than allulose.
Can I make this recipe dairy-free?
Absolutely! You can substitute the keto frosting with a dairy-free alternative or use coconut cream to achieve a similar texture without dairy.
What if I can’t find almond flour?
If almond flour is unavailable, you can try using coconut flour, but remember to adjust the quantity, as coconut flour absorbs more moisture than almond flour.
Can I add other flavors to the custard?
Yes! Feel free to infuse your custard with flavors like chocolate, coffee, or citrus zest for a fun twist on the classic recipe.
The Takeaway
Creating a Keto Boston Cream Pie is not only a fun baking adventure but also a fantastic way to enjoy a classic dessert without the guilt. With just a handful of ingredients and a few simple steps, you can whip up a delicious pie that everyone will love. Whether you’re serving it at a family gathering or just enjoying a slice at home, this Keto Boston Cream Pie is sure to impress.
Indulge in this beautiful dessert, and savor each bite knowing you’re sticking to your keto lifestyle while treating yourself to something truly special. Happy baking!

Keto Boston Cream Pie
Ingredients
- 8 large eggs
- 1/4 cup coconut oil melted
- 1 tablespoon vanilla extract
- 1 cup allulose
- 4 cups almond flour
- 2 teaspoons baking powder
- 1 batch keto custard
- 1 cup keto frosting
Instructions
- Preheat your oven to 350°F (175°C).
- In a large mixing bowl, beat the 8 large eggs until light and frothy. Gradually add in melted coconut oil, vanilla extract, and allulose. Mix until well combined.
- In a separate bowl, whisk together almond flour and baking powder. Slowly add dry ingredients to wet mixture, stirring until just combined.
- Divide the batter between two 9-inch round cake pans and bake for 25-30 minutes, or until a toothpick inserted comes out clean.
- Allow cakes to cool in the pans for 10 minutes before transferring to a wire rack to cool completely.
- While the cake layers are cooling, prepare your keto custard according to your favorite recipe.
- Once cool, place one layer on a serving plate. Spread the keto custard evenly over the top and place the second layer on top.
- Spread keto frosting over the top of the second layer generously.
- Chill the assembled Keto Boston Cream Pie in the refrigerator for at least an hour before slicing.
Equipment
- Mixing Bowls
- Electric Mixer
- Oven
- 9-inch round cake pans
- Spatula
Notes
- Store leftovers in an airtight container in the refrigerator for up to 5 days.
- You can freeze the cake layers separately, well-wrapped to prevent freezer burn.
- Experiment with flavored extracts for different variations!
