Gluten Free Lemon Poppy Seed Blackberry Cake Recipe
This Gluten Free Lemon Poppy Seed Blackberry Cake is a delightful, moist, and flavorful treat perfect for any occasion. Featuring a light lemon-infused cake studded with poppy seeds and fresh blackberries, it’s topped with a luscious blackberry buttercream frosting. The cake combines gluten-free all-purpose flour and almond flour for a tender crumb and bursts with citrus and berry flavors that make it irresistibly fresh and summery.
- Author: Lila
- Prep Time: 15 minutes
- Cook Time: 35 minutes
- Total Time: 50 minutes
- Yield: 12 servings 1x
- Category: Dessert
- Method: Baking
- Cuisine: American
- Diet: Gluten Free
Cake
- 2 eggs
- 1 cup sugar
- 1/3 cup oil
- 1/2 cup milk
- 2 tablespoons lemon juice
- 2 tablespoons lemon zest
- 1/2 teaspoon lemon extract
- 1 teaspoon vanilla extract
- 1 3/4 cups gluten free all purpose baking flour (Bob’s Red Mill 1:1 recommended)
- 1/2 cup almond flour
- 3/4 teaspoon baking powder
- 1/2 teaspoon baking soda
- 1/4 teaspoon salt
- 1 1/2 tablespoons poppy seeds
- 1/2 cup blackberries + 2 teaspoons flour (for tossing)
Frosting
- 1/2 cup butter, softened at room temperature
- 2 cups powdered sugar
- 1/2 cup fresh blackberries
- 2–3 tablespoons blackberry jam
- 1 tablespoon lemon zest
- 1/2 teaspoon vanilla extract
- Preheat Oven: Preheat your oven to 350°F (175°C) to ensure it reaches the right temperature for baking the cake evenly.
- Toss Blackberries: Gently toss 1/2 cup of blackberries with 2 teaspoons of flour to prevent them from sinking to the bottom of the cake batter. Set aside.
- Prepare Pan: Line an 8×8 inch baking pan with parchment paper for easy removal and to prevent sticking.
- Mix Wet Ingredients: In a large mixing bowl or stand mixer bowl, combine eggs, sugar, oil, milk, lemon juice, lemon zest, lemon extract, and vanilla extract. Beat on low speed until fully combined.
- Add Dry Ingredients: Spoon and level the gluten-free all-purpose flour, almond flour, baking powder, baking soda, and salt into the wet ingredients. Beat on low speed until just combined to avoid overmixing.
- Fold in Seeds and Berries: Gently fold in the poppy seeds followed by the floured blackberries to evenly distribute them throughout the batter.
- Transfer and Bake: Pour the batter into the prepared baking pan and bake for 32-40 minutes or until a toothpick inserted in the center comes out clean. Typically, 35 minutes yields perfect results.
- Cool Cake: Remove the cake from the oven and let it cool in the pan for 15 minutes. Then carefully flip it onto a wire rack to cool completely.
- Prepare Frosting Butter Base: While the cake cools, cream softened butter in a bowl or stand mixer for 2-3 minutes until smooth and creamy.
- Add Powdered Sugar: Gradually add powdered sugar to the creamed butter and mix well until fully incorporated.
- Blend Blackberry Mixture: Combine fresh blackberries and blackberry jam in a blender and blend until smooth and combined.
- Combine Frosting Ingredients: Add the blackberry puree, vanilla extract, and lemon zest to the butter and sugar mixture. Beat until fluffy and well combined.
- Adjust Frosting Consistency: Taste the frosting and adjust thickness by thinning with a splash of milk if too thick, or adding more powdered sugar if too thin.
- Frost and Serve: Once the cake is completely cooled, spread the blackberry frosting evenly on top. Optionally swirl some extra blackberry jam for decoration. Slice, serve, and enjoy!
Notes
- Ensure all ingredients, especially butter and eggs, are at room temperature for better mixing and texture.
- Use gluten-free all-purpose flour blend that includes xanthan gum or add some if your blend doesn’t contain it to help the cake hold together.
- If fresh blackberries are not available, frozen ones can be used but thaw and pat dry to reduce added moisture.
- Line the baking pan with parchment paper extending over the sides to easily lift the cake out once baked.
- Adjust lemon zest and juice according to your taste preference for stronger or milder lemon flavor.
- For a dairy-free version, substitute butter with a plant-based alternative and milk with almond or oat milk.
- Store leftover cake covered in the refrigerator for up to 4 days; bring to room temperature before serving for best taste.
Keywords: gluten free lemon cake, lemon poppy seed cake, blackberry cake, gluten free dessert, lemon berry cake, dairy free frosting option