Introduction to Keto Lemon Poppy Seed Cake
If you’re searching for a delightful dessert that perfectly balances indulgence and health, look no further than the Keto Lemon Poppy Seed Cake with Blackberry Buttercream. This cake is a testament to the idea that keto-friendly doesn’t mean sacrificing flavor or satisfaction. With its zesty lemon and nutty poppy seeds, this cake offers a refreshing twist that is perfect for any occasion.
A Flavorful Keto Delight
Made with almond and coconut flour, this cake is not only low in carbs but also rich in healthy fats, making it suitable for those following a keto diet. The combination of fresh lemon juice and zest infuses each slice with a bright, tangy flavor that plays beautifully against the subtle crunch of the poppy seeds. Topped with a luscious blackberry buttercream, this cake is sure to impress both keto enthusiasts and dessert lovers alike.
Why You’ll Love It
Imagine serving this cake at your next gathering—its stunning appearance and unique flavors will have your guests asking for the recipe. Plus, with a preparation time that fits into even the busiest schedules, this cake is an easy way to treat yourself and your loved ones. Not only does it taste incredible, but it’s a guilt-free indulgence that aligns perfectly with your health goals. So, are you ready to indulge in a slice of this keto delight?
Key Ingredients Explained
When crafting the Keto Lemon Poppy Seed Cake with Blackberry Buttercream, each ingredient plays a crucial role in achieving the perfect flavor and texture while adhering to keto guidelines.
Almond Flour
Almond Flour (1 ½ cups): This gluten-free flour is low in carbohydrates and high in healthy fats, making it a staple in keto baking. Its mild flavor and fine texture provide a superb base for the cake, ensuring a moist and tender crumb.
Coconut Flour
Coconut Flour (1/4 cup): Known for its absorbency, coconut flour adds a unique flavor while helping to balance the moisture content in the batter. It’s a great source of fiber, which aids in digestion and keeps you feeling full longer.
Poppy Seeds
Poppy Seeds (1/4 cup): These tiny seeds add a delightful crunch and nutty flavor, enhancing the overall texture of the cake. They are rich in essential fatty acids and provide a subtle, aromatic touch that pairs beautifully with lemon.
Erythritol
Erythritol (1 cup): This natural sweetener is a favorite in keto recipes due to its zero calories and low glycemic index. It mimics the sweetness of sugar without the guilt, making it perfect for satisfying those sweet cravings.
Unsalted Butter
Unsalted Butter (1/2 cup, melted): Butter not only adds richness and moisture but also contributes to the cake’s tender structure. Using unsalted butter allows you to control the salt levels in your recipe, resulting in a balanced flavor.
Blackberries
Blackberries (1 cup): These juicy berries are the star of the buttercream, bringing natural sweetness and a vibrant color to the frosting. Packed with antioxidants, they add a healthful twist to this indulgent dessert.
Heavy Cream
Heavy Cream (1-2 tbsp): This ingredient is used to achieve the desired consistency of the blackberry buttercream. Its richness ensures a creamy texture that pairs perfectly with the tangy blackberries, creating a luscious frosting that complements the cake.
By understanding the role of each key ingredient, you can appreciate how they contribute to the delightful experience of enjoying a slice of Keto Lemon Poppy Seed Cake with Blackberry Buttercream.
Why You’ll Love This Recipe
Keto Lemon Poppy Seed Cake with Blackberry Buttercream is not just a dessert; it’s an experience. With its vibrant flavors and delightful textures, this cake brings a touch of sunshine to any occasion, making it perfect for gatherings or a special treat just for yourself.
A Guilt-Free Indulgence
This recipe allows you to enjoy a slice of cake without the guilt typically associated with traditional desserts. It’s crafted to fit your keto lifestyle, providing a sweet escape that keeps you on track with your health goals. Plus, the use of natural sweeteners ensures that you can indulge without spiking your blood sugar levels.
Ideal for Any Occasion
Whether you’re celebrating a birthday, hosting a brunch, or simply craving something sweet, this cake is versatile enough for any event. Its beautiful presentation, with the rich blackberry buttercream contrasting against the bright lemon cake, is sure to impress your guests. And let’s be honest, who wouldn’t want to dig into a slice of this deliciousness?
Quick and Easy to Make
One of the highlights of this recipe is its simplicity. With straightforward instructions and minimal prep time, even the busiest young professionals will find it easy to whip up. Imagine serving this stunning cake after a long day, knowing you created something delicious and nourishing. Are you ready to treat yourself to this delightful keto dessert?
Variations
The Keto Lemon Poppy Seed Cake with Blackberry Buttercream is versatile, allowing you to customize it to suit your tastes and occasions. Here are a few delightful variations to consider:
Add Different Flavors
For a unique twist, consider incorporating other citrus fruits like orange or lime into the batter. Simply replace some of the lemon juice and zest with your chosen citrus to create a refreshing flavor profile that complements the poppy seeds beautifully.
Change the Frosting
While the blackberry buttercream is a star, you can experiment with other frostings as well. A cream cheese frosting or a simple whipped coconut cream can provide a delightful alternative, offering different textures and tastes that pair well with the lemon cake.
Make It a Layer Cake
To elevate your dessert, transform this recipe into a multi-layer cake. Bake additional layers of the lemon poppy seed cake, stacking them with generous amounts of frosting in between. This not only increases the visual appeal but also enhances the flavor experience with each slice.
Gluten-Free Options
If you’re looking for a completely gluten-free option, consider substituting the almond flour with sunflower seed flour for a nut-free version. Just keep in mind that it may alter the flavor slightly, but the cake will still be delicious!
With these variations, you can keep the classic essence of the Keto Lemon Poppy Seed Cake while introducing exciting new flavors that make every bite a delightful surprise. Enjoy exploring these options and creating your own unique version of this keto-friendly treat!

Cooking Tips and Notes
Baking the Keto Lemon Poppy Seed Cake with Blackberry Buttercream is a straightforward process, but a few tips can help ensure your cake turns out perfectly every time.
Prepping Your Ingredients
Before you start baking, make sure all your ingredients are at room temperature. This helps them combine more easily, resulting in a smoother batter. Additionally, measure your ingredients accurately, especially the flours, as even slight variations can affect the cake’s texture.
Cooling the Cakes
Once your cakes are baked, allow them to cool in the pans for about 10 minutes before transferring them to a wire rack. This helps prevent them from becoming soggy. Make sure the cakes are completely cool before frosting; otherwise, the buttercream may melt and slide off, compromising the beautiful presentation.
Storing Leftovers
For optimal freshness, store any leftover cake in an airtight container in the refrigerator. The cake is best enjoyed within five days, but you can also freeze it for longer storage. Just be sure to wrap it tightly to prevent freezer burn. When you’re ready to enjoy it again, let it thaw in the fridge overnight.
These cooking tips will help you achieve a delicious and visually appealing Keto Lemon Poppy Seed Cake with Blackberry Buttercream that you can be proud to serve at any occasion!
Serving Suggestions
The Keto Lemon Poppy Seed Cake with Blackberry Buttercream is not only delicious but also versatile in its serving options, making it a delightful addition to any occasion.
Pair with Fresh Berries
To enhance the cake’s bright flavors, serve it alongside a medley of fresh berries. The tartness of the berries complements the sweetness of the blackberry buttercream perfectly, adding a refreshing touch that brightens each bite.
Accompany with Whipped Cream
For an extra indulgence, consider adding a dollop of homemade whipped cream. You can sweeten the cream with a keto-friendly sweetener to keep it aligned with your dietary goals. This creamy addition adds richness and balances the cake’s texture beautifully.
Serve with a Cup of Tea or Coffee
This cake pairs wonderfully with a warm cup of tea or coffee. The citrus notes of the cake harmonize with various tea flavors, especially Earl Grey or chamomile, while a rich coffee can enhance the cake’s sweetness, making for a cozy dessert experience.
With these serving suggestions, you can elevate your Keto Lemon Poppy Seed Cake with Blackberry Buttercream to new heights, ensuring it’s a hit at your next gathering!

Time Breakdown
Understanding the time required to prepare the Keto Lemon Poppy Seed Cake with Blackberry Buttercream can help you fit this delicious dessert into your busy schedule.
Preparation
Prepare your cake by gathering all ingredients and mixing the batter. This usually takes about 15 minutes.
Cooking/Baking
Baking the cake takes approximately 25-30 minutes in the oven, ensuring it’s perfectly cooked and ready for frosting.
Total
In total, you can expect to spend around 45-60 minutes from start to finish, not including cooling time. A great tip is to prepare the cake ahead of time and refrigerate it, allowing the flavors to meld beautifully before serving.
Nutritional Facts
When it comes to enjoying desserts on a keto diet, understanding the nutritional profile of the Keto Lemon Poppy Seed Cake with Blackberry Buttercream is essential. Each serving of this delicious cake contains approximately 250 calories, making it a satisfying treat that won’t derail your dietary goals.
Key Nutritional Information
This cake boasts 2g of sugar and 10g of carbohydrates, with 5g of dietary fiber, allowing for a net carb count of just 5g per slice. Additionally, each slice provides 20g of fat and 6g of protein, supporting your keto lifestyle while satisfying your sweet cravings. With 120mg of cholesterol, this cake is a rich, indulgent option that remains mindful of your health goals. Enjoy this flavorful dessert knowing it fits perfectly within your keto diet!
FAQs
Can I use a different sweetener instead of erythritol?
Yes, you can substitute erythritol with other keto-friendly sweeteners like monk fruit or stevia. Just be sure to adjust the quantities according to the sweetness level of the substitute, as they can differ significantly.
How should I store leftover cake?
Store any leftover Keto Lemon Poppy Seed Cake with Blackberry Buttercream in an airtight container in the refrigerator. It will stay fresh for up to five days, but for the best texture and flavor, enjoy it within the first few days after baking.
Can I freeze the cake?
Absolutely! You can freeze the cake for longer storage. Wrap it tightly in plastic wrap and then foil to prevent freezer burn. When you’re ready to enjoy it, simply thaw it in the refrigerator overnight.
How do I ensure my cake comes out moist?
To keep your cake moist, make sure not to overbake it. Checking for doneness a few minutes before the suggested baking time can help. Additionally, using fresh ingredients and allowing the cake to cool completely before frosting will enhance the overall moisture.
What can I serve with this cake?
This cake pairs wonderfully with a variety of accompaniments. Consider serving it with fresh berries, whipped cream, or a side of tea or coffee to enhance the flavor experience. Each option adds a delightful contrast to the lemony sweetness of the cake.
Conclusion
The Keto Lemon Poppy Seed Cake with Blackberry Buttercream is a delightful dessert that perfectly balances indulgence and health. With its fresh lemon flavor and light, fluffy texture, this cake is an excellent choice for anyone following a keto lifestyle. Not only is it delicious, but it’s also easy to make, requiring minimal time and effort.
If you’re looking to impress your friends and family or simply treat yourself, this cake is the perfect option. The vibrant flavors and beautiful presentation make it a showstopper at any gathering. So why wait? Try baking this delightful cake today, and don’t forget to share your experience with others—your new favorite dessert awaits!
Print
Keto Lemon Poppy Seed Cake with Blackberry Buttercream
- Total Time: 45 minutes
- Yield: 8 servings 1x
- Diet: Keto
Description
A delicious and indulgent keto-friendly cake that features the bright flavors of lemon and poppy seeds, topped with a rich blackberry buttercream.
Ingredients
- 1 ½ cups almond flour
- 1/4 cup coconut flour
- 1/4 cup poppy seeds
- 1 tsp baking powder
- 1/2 tsp baking soda
- 1/4 tsp salt
- 6 large eggs
- 1 cup erythritol or sweetener of choice
- 1/2 cup unsalted butter, melted
- 1/2 cup unsweetened almond milk
- 1 tbsp vanilla extract
- 1 tbsp lemon juice
- Zest of 2 lemons
- 1 cup blackberries
- 1/2 cup butter, softened
- 1 cup powdered erythritol
- 1-2 tbsp heavy cream or almond milk (for consistency)
Instructions
- Preheat your oven to 350°F (175°C) and grease two 9-inch round cake pans.
- In a large bowl, mix together almond flour, coconut flour, poppy seeds, baking powder, baking soda, and salt.
- In another bowl, whisk together eggs, erythritol, melted butter, almond milk, vanilla extract, lemon juice, and lemon zest.
- Combine the wet ingredients with the dry ingredients and mix until well blended.
- Divide the batter evenly between the prepared cake pans.
- Bake for 25-30 minutes or until a toothpick inserted comes out clean.
- Allow the cakes to cool completely before frosting.
- For the blackberry buttercream, blend blackberries until smooth, then mix with softened butter and powdered erythritol until creamy.
- Add heavy cream or almond milk as necessary to achieve the desired consistency.
- Frost the cooled cakes with the blackberry buttercream and decorate as desired.
Notes
- For best results, refrigerate the cake for a few hours before serving.
- Store leftovers in an airtight container in the refrigerator for up to 5 days.
- Prep Time: 15 minutes
- Cook Time: 30 minutes
- Category: Dessert
- Method: Baking
- Cuisine: American
Nutrition
- Serving Size: 1 slice
- Calories: 250
- Sugar: 2g
- Sodium: 150mg
- Fat: 20g
- Saturated Fat: 10g
- Unsaturated Fat: 8g
- Trans Fat: 0g
- Carbohydrates: 10g
- Fiber: 5g
- Protein: 6g
- Cholesterol: 120mg
