A lemon poppy seed cake is the kind of dessert that always feels fresh, bright, and effortlessly elegant. This gluten-free lemon poppy seed cake delivers all of that classic flavor with a soft, moist crumb, plenty of fresh lemon zest, and delicate pops of texture from the poppy seeds.

Finished with a silky cream cheese frosting and swirls of vibrant lemon curd, this cake feels a little more elevated than your everyday snack cake while still being simple enough to make anytime. It’s the kind of dessert that works just as beautifully for Easter brunch, Mother’s Day, baby showers, or an easy weekend bake.

Made with gluten-free flour, this recipe is every bit as tender and satisfying as a traditional version—no one will guess it’s gluten-free. If you love bright citrus desserts with a bakery-style finish, this is one to bookmark.

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Why You’ll Love This Recipe

Bright, fresh lemon flavor
Fresh lemon zest and lemon juice bring vibrant citrus flavor to every bite, while the lemon curd swirl adds an extra burst of brightness.

Soft and tender texture 
This cake has a moist, delicate crumb that stays soft for days thanks to the combination of butter, sour cream, and oil.

Beautifully balanced sweetness 
The tangy cream cheese frosting keeps the cake rich without feeling overly sweet.

Easy yet elevated 
While it looks bakery-worthy, this simple snack-style cake comes together in a standard square pan with no layering required.

Perfect for spring and special occasions
This is a lovely dessert for Easter, Mother’s Day, brunch gatherings, showers, or an everyday citrus craving.

No one will guess it’s gluten-free
Made with gluten-free flour, this cake is every bit as delicious and satisfying as a traditional version.

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Ingredient Notes

Gluten-free 1:1 flour 
Use a high-quality gluten-free all-purpose flour blend that contains xanthan gum for the best texture. I like Bob’s Red Mill Gluten Free 1:1 Baking Flour.

Almond flour
Almond flour adds moisture, tenderness, and a delicate richness that pairs beautifully with the bright lemon flavor.

Granulated sugar
Rubbing the lemon zest into the sugar helps release the natural oils in the zest, creating deeper lemon flavor throughout the cake.

Fresh lemon zest and lemon juice
Fresh lemons are essential here. Both the zest and juice add a vibrant citrus flavor that bottled juice can’t replicate.

Unsalted butter
Butter adds richness and flavor while contributing to a soft, tender crumb.

Neutral oil
A small amount of oil helps keep the cake moist for days. Avocado oil or another neutral-flavored oil works well.

Sour cream
Sour cream adds richness and helps create a plush, bakery-style texture. Full-fat Greek yogurt can be substituted if needed.

Eggs 
Use room temperature eggs so they blend smoothly into the batter and help create an even rise.

Poppy seeds 
Poppy seeds add the signature flavor and subtle crunch that make lemon poppy seed cake so classic.

Cream cheese 
Use block-style full-fat cream cheese for the smoothest, richest frosting.

Powdered sugar
Powdered sugar sweetens the frosting while keeping it silky and spreadable.

Lemon curd
Swirled into the frosting, lemon curd adds glossy brightness and an extra layer of citrus flavor. I love using my homemade lemon curd here, but store-bought works beautifully as well.

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How to Make Lemon Poppy Seed Cake

See the recipe card below for the full ingredient list, measurements, and instructions.

Step 1: Make the lemon sugar 
Add the granulated sugar and lemon zest to a large mixing bowl. Rub the zest into the sugar with your fingertips until the sugar is fragrant and slightly moistened.

Step 2: Mix the dry ingredients 
Add the gluten-free flour, almond flour, baking powder, baking soda, and salt to the lemon sugar. Whisk until evenly combined.

Step 3: Add the butter
Add the softened, cubed butter to the dry ingredients. Using a hand mixer or stand mixer fitted with the paddle attachment, mix until the butter is fully incorporated and the mixture resembles coarse crumbs.

Step 4: Combine the wet ingredients
In a separate bowl, whisk together the eggs, whole milk, sour cream, avocado oil, lemon juice, vanilla extract, and almond extract until smooth.

Step 5: Make the batter
Pour the wet ingredients into the dry mixture and mix on low speed just until combined. The batter should be smooth and thick, with no large dry streaks remaining.

Step 6: Fold in the poppy seeds 
Add the poppy seeds and gently mix until evenly distributed throughout the batter.

Step 7: Bake the cake
Spread the batter evenly into a prepared 9×9-inch metal baking pan. Bake at 325°F until the top is set and a toothpick inserted into the center comes out clean or with a few moist crumbs. Let the cake cool completely before frosting.

Step 8: Frost and finish
Spread the cream cheese frosting over the cooled cake, then spoon the lemon curd on top. Use an offset spatula or the back of a spoon to gently swirl the lemon curd into the frosting. Slice and serve.

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Recipe Tips

Use room temperature ingredients
Let the butter, eggs, milk, sour cream, and cream cheese come to room temperature before baking. This helps everything blend smoothly and creates a more even crumb.

Rub the lemon zest into the sugar
Don’t skip this step. Massaging the zest into the sugar releases the natural citrus oils and gives the cake a deeper, brighter lemon flavor.

Measure your flour with a kitchen scale
Gluten-free baking is most consistent when ingredients are weighed rather than measured by volume.

Use a light-colored metal baking pan
A light metal pan bakes more evenly and helps prevent over-browned edges or a dry cake.

Do not overmix the batter
Mix just until the ingredients are combined. Overmixing can create a dense texture.

Cool the cake completely before frosting
Even slight warmth can melt the cream cheese frosting and soften the lemon curd swirl.

Chill before slicing for cleaner squares
If you’d like especially neat slices, refrigerate the frosted cake for 20–30 minutes before cutting.

Use an offset spatula for easy swirling
It helps create soft, bakery-style swoops in the frosting and lemon curd without overblending them together.

Wipe the knife between cuts
Cleaning the knife between slices keeps the frosting looking neat and polished.

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Storage & Freezing

Refrigerator
Store the frosted cake covered or in an airtight container in the refrigerator for up to 4 days. For the best texture and flavor, let slices sit at room temperature for 15–20 minutes before serving.

Freezer
You can freeze the cake unfrosted, or freeze individual frosted slices. Wrap tightly in plastic wrap, then place in an airtight container or freezer-safe bag and freeze for up to 2 months.

To serve after freezing
Transfer to the refrigerator overnight or let individual slices thaw at room temperature for 30–45 minutes before serving.

Make-ahead tips
The lemon curd can be prepared up to 3 days in advance and stored in the refrigerator. The cake can also be baked a day ahead, then frosted before serving.

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Frequently Asked Questions

Can I make this cake dairy-free?
I have not tested a fully dairy-free version of this recipe, but you could experiment with dairy-free butter, dairy-free cream cheese, and a dairy-free sour cream alternative. Keep in mind that texture and flavor may vary.

Can I use only gluten-free 1:1 flour and skip the almond flour?
The almond flour adds moisture and tenderness to the cake, so I recommend keeping it if possible. If needed, you can substitute additional gluten-free 1:1 flour, though the texture may be slightly less soft.

Do I have to use lemon curd?
No. The cake is still delicious with cream cheese frosting alone, but the lemon curd adds extra citrus flavor and a beautiful bakery-style finish.

Can I use store-bought lemon curd?
Absolutely. Store-bought lemon curd works well, or you can use my homemade lemon curd for the freshest flavor.

What type of pan should I use?
A light-colored 9×9-inch metal baking pan is ideal for even baking. Glass or dark pans may require adjustments to baking time and can brown the edges more quickly.

How do I know when the cake is done baking?
The top should look set and lightly golden, and a toothpick inserted into the center should come out clean or with a few moist crumbs.

Can I make this cake ahead of time?
Yes. You can bake the cake one day in advance, then frost and finish it the next day. Store the unfrosted cake tightly covered at room temperature or in the refrigerator.

Does this cake need to be refrigerated?
Yes. Because of the cream cheese frosting, leftover cake should be stored in the refrigerator.

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Photography by Creating Kaitlin

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