Lemon Poppy Seed Bundt Cake

Can a Lemon Poppy Seed Bundt Cake Really Be Keto?

Did you know a single slice of a traditional lemon poppy seed bundt cake can carry 50 grams of carbs or more? Most people assume that puts this bright, tender dessert off the table for low-carb eating. It doesn’t. This lemon poppy seed bundt cake recipe swaps wheat flour and sugar for almond flour, coconut flour, and a monk fruit and erythritol sweetener. The result is a moist, buttery crumb with a zesty lemon glaze and only about 3 grams of net carbs per slice.

If you’ve missed sunny citrus desserts since going keto, this one is for you. It’s simple, it feeds a crowd, and it tastes like the real thing.

Ingredients for This Lemon Poppy Seed Bundt Cake

For the cake:

• 2 cups super-fine almond flour (nutty and buttery; it gives the cake its tender crumb)
• 1/4 cup coconut flour (soaks up moisture and keeps the cake from being greasy)
• 3/4 cup granulated monk fruit and erythritol blend
• 2 tablespoons poppy seeds (they add a light crunch and a pretty speckle)
• 2 teaspoons baking powder
• 1/2 teaspoon fine salt
• 5 large eggs, at room temperature
• 1/2 cup melted unsalted butter, cooled slightly
• 1/2 cup full-fat sour cream
• 1/3 cup fresh lemon juice (about 2 lemons)
• Zest of 2 lemons (the fragrant oils are where the flavor is)
• 1 teaspoon vanilla extract

For the glaze:

• 1/2 cup powdered erythritol
• 2 to 3 tablespoons lemon juice
• 1 tablespoon heavy cream

Substitutions:

• Sour cream: full-fat Greek yogurt or coconut cream
• Butter: ghee or refined coconut oil
• Sweetener: allulose, though the cake browns faster
• Nut-free: swap the almond flour for sunflower seed flour (the cake may turn slightly green from a harmless reaction with baking powder)

Timing

• Prep time: 15 minutes
• Bake time: 45 to 50 minutes
• Cooling and glazing: 30 minutes
• Total time: about 1 hour 35 minutes

That’s roughly 25% less hands-on time than many traditional recipes, which often need creaming, sifting, and long resting periods. This lemon poppy seed bundt cake comes together in one bowl and needs very little effort.

Step-by-Step Instructions

Step 1: Prep the Pan

Preheat your oven to 350°F (175°C). Grease a 10-cup Bundt pan thoroughly with butter or coconut oil, getting into every groove.

Tip: Dust it lightly with almond flour so the cake releases cleanly.

Step 2: Mix the Dry Ingredients

In a large bowl, whisk together the almond flour, coconut flour, sweetener, poppy seeds, baking powder, and salt. Whisk well to break up any lumps. Almond flour clumps easily, and lumps mean uneven texture.

Step 3: Rub in the Lemon Zest

Add the lemon zest to the sweetener and rub it in with your fingertips for about 30 seconds. This releases the oils and makes the whole cake smell like a lemon grove.

Step 4: Add the Wet Ingredients

In a separate bowl, whisk the eggs, melted butter, sour cream, lemon juice, and vanilla until smooth. Pour this into the dry mix and stir until just combined. The batter will be thick and spoonable. If it looks too stiff, don’t add more liquid, since the coconut flour keeps absorbing as it rests.

Step 5: Bake Your Lemon Poppy Seed Bundt Cake

Spoon the batter into the pan and smooth the top. Bake for 45 to 50 minutes, until the top is golden and a toothpick comes out clean. If the top browns too quickly, tent it loosely with foil for the last 10 minutes.

Step 6: Cool Before Flipping

Let the cake cool in the pan for 20 minutes, then run a thin knife around the edges and invert it onto a wire rack. Patience matters here. Keto cakes are fragile while warm and will crack if you rush them.

Step 7: Glaze and Serve

Whisk the powdered erythritol, lemon juice, and cream until pourable. Once the cake is fully cool, drizzle the glaze over the top and let it set for 10 minutes.

Nutritional Information for Lemon Poppy Seed Bundt Cake

Estimated values per slice (makes 12 slices):

• Calories: 235
• Total fat: 21 g
• Total carbohydrates: 6 g
• Fiber: 3 g
• Net carbs: 3 g
• Protein: 8 g
• Sugar alcohols: 12 g (not counted in net carbs)

For comparison, a slice of traditional lemon poppy seed bundt cake usually has 45 to 60 grams of carbs. That’s over a 90% reduction. Values are estimates and will vary with your brands, so run your exact ingredients through a database like USDA FoodData Central if you’re tracking closely.

Healthier Alternatives for the Recipe

You can tweak this lemon poppy seed bundt cake recipe to fit different needs without losing the flavor:

• Dairy-free: use coconut cream and ghee or coconut oil
• Lower sweetener load: use a stevia and erythritol blend and cut the amount by a quarter
• Extra fiber: replace 2 tablespoons of almond flour with ground flaxseed
• Lighter glaze: skip the cream and use only lemon juice and powdered sweetener
• Egg-light: add a tablespoon of unflavored collagen to help the structure if you’re using smaller eggs

Serving Suggestions

Serve the lemon poppy seed bundt cake in thick slices with a dollop of whipped cream and a few fresh raspberries or blueberries. For brunch, pair it with hot coffee or a cold glass of unsweetened iced tea. For a party, arrange thin slices on a platter with lemon wheels and fresh mint. It also works as a light after-dinner dessert. Want a denser, buttery option to serve alongside it? Try our keto lemon pound cake. If you enjoy baking in a bundt pan, our keto bundt cake is another great choice, and you can browse all of our keto dessert recipes for more pairings.

Common Mistakes to Avoid

• Using cold eggs or sour cream. Cold ingredients make the batter seize and bake unevenly. Set them out 30 minutes ahead.
• Skipping the pan prep. Bundt pans are unforgiving. A thorough greasing is the most common fix for a stuck cake.
• Overbaking. Almond flour cakes dry out fast. Start checking at 45 minutes.
• Using coarse almond flour. It gives a gritty crumb. Choose super-fine, blanched flour.
• Glazing a warm cake. The glaze will melt and run off. Wait until it’s completely cool.
• Using bottled lemon juice. Fresh juice and zest make a noticeable difference in flavor.

Storing Tips for the Recipe

Store your lemon poppy seed bundt cake, unglazed or glazed, in an airtight container at room temperature for up to 2 days. In the fridge, it keeps for 7 days, and it tastes even better the next day as the lemon flavor deepens. To freeze, wrap slices individually in parchment and store them in a freezer bag for up to 3 months. Thaw overnight in the fridge. If you plan to make it ahead, bake the cake and add the glaze fresh before serving.

Conclusion

This lemon poppy seed bundt cake is moist, bright, and only 3 grams of net carbs per slice. It uses simple ingredients and one bowl. Try it this weekend, then leave a comment below to tell us how it turned out, and subscribe for more keto recipes and updates.

FAQs

Lemon Poppy Seed Bundt Cake

Recipe by Leese

0.0 from 0 votes

Course: DessertCuisine: American

Servings

12

slices

Prep time

15

minutes

Cooking time

50

minutes

Total time

1

hour 

35

minutes

An easy keto lemon poppy seed bundt cake made with almond flour, fresh lemon, and a sugar-free glaze. Only 3g net carbs per slice.

Ingredients

• 2 cups super-fine almond flour

• 1/4 cup coconut flour

• 3/4 cup granulated monk fruit and erythritol blend

• 2 tablespoons poppy seeds

• 2 teaspoons baking powder

• 1/2 teaspoon fine salt

• 5 large eggs, at room temperature

• 1/2 cup melted unsalted butter

• 1/2 cup full-fat sour cream

• 1/3 cup fresh lemon juice

• Zest of 2 lemons

• 1 teaspoon vanilla extract

• 1/2 cup powdered erythritol (glaze)

• 2 to 3 tablespoons lemon juice (glaze)

• 1 tablespoon heavy cream (glaze)

Directions

• Prep the pan:
  Preheat the oven to 350°F (175°C) and grease a 10-cup Bundt pan thoroughly.
• Mix the dry ingredients:
  Whisk the almond flour, coconut flour, sweetener, poppy seeds, baking powder, and salt.
• Rub in the lemon zest:
  Rub the lemon zest into the sweetener for 30 seconds to release the oils.
• Add the wet ingredients:
  Whisk the eggs, butter, sour cream, lemon juice, and vanilla, then stir into the dry mix until just combined.
• Bake:
  Spoon the batter into the pan and bake for 45 to 50 minutes, until golden and a toothpick comes out clean.
• Cool before flipping:
  Cool in the pan for 20 minutes, then invert onto a wire rack.
• Glaze and serve:
  Whisk the glaze ingredients and drizzle over the fully cooled cake. Let it set for 10 minutes.