Gluten-Free Lemon Poppy Seed Blackberry Cake Recipe

Introduction

This gluten-free lemon poppy seed blackberry cake is a delightful combination of tart citrus and sweet berries, perfect for any occasion. Moist and tender, it features a luscious blackberry frosting that elevates the flavors beautifully. Whether for a special dessert or an afternoon treat, this cake is sure to impress.

Ingredients

• 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 (e.g., Bob’s Red Mill 1:1)
• 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 (optional, for tossing)
• 1/2 cup butter, softened (room temperature)
• 2 cups powdered sugar
• 1/2 cup fresh blackberries (for frosting)
• 2-3 tablespoons blackberry jam (for frosting and garnish)
• 1 tablespoon lemon zest (for frosting)
• 1/2 teaspoon vanilla extract (for frosting)

Instructions

1. Step 1: Preheat the oven to 350°F (175°C). Line an 8×8 inch baking pan with parchment paper and set aside.
2. Step 2: Toss the 1/2 cup blackberries with 2 teaspoons of flour to help prevent sinking, then set aside.
3. Step 3: In a large mixing bowl or the bowl of a stand mixer, beat together the eggs, sugar, oil, milk, lemon juice, lemon zest, lemon extract, and vanilla extract on low speed until combined.
4. Step 4: Add the gluten free all purpose flour, almond flour, baking powder, baking soda, and salt to the wet ingredients. Spoon and level the flours for accuracy. Beat on low speed just until combined.
5. Step 5: Fold in the poppy seeds followed by the floured blackberries gently to avoid breaking them.
6. Step 6: Transfer the batter to the prepared pan and bake for 32-40 minutes, or until a toothpick inserted in the center comes out clean. The cake is usually perfect around 35 minutes.
7. Step 7: 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.
8. Step 8: While the cake cools, prepare the frosting. Beat the softened butter in a bowl or stand mixer for 2-3 minutes until creamy.
9. Step 9: Add the powdered sugar to the butter and mix until well combined.
10. Step 10: Blend the fresh blackberries and blackberry jam together until smooth.
11. Step 11: Add the blackberry mixture, vanilla extract, and lemon zest to the butter and sugar mixture. Beat until fluffy and well combined.
12. Step 12: Taste the frosting and adjust the consistency as needed. If too thick, thin it with a bit of milk; if too thin, add more powdered sugar.
13. Step 13: Once the cake is completely cool, spread the frosting evenly on top. For an extra touch, swirl additional blackberry jam over the frosting before serving.

Tips & Variations

• Use fresh blackberries for the best flavor and texture, but frozen can work in a pinch—just thaw and drain well.
• To make the cake dairy-free, substitute the milk with almond milk and use a dairy-free butter alternative for the frosting.
• Add a pinch of cinnamon or cardamom to the batter for a warm, spicy twist.
• Ensure the blackberries are well-coated in flour before folding in to prevent them from sinking to the bottom during baking.
• For a more intense lemon flavor, increase the lemon zest in both the cake and frosting slightly.

Storage

Store the cake covered in the refrigerator for up to 3 days, as the frosting contains fresh berries. Before serving, let it come to room temperature for the best texture and flavor. You can also freeze the unfrosted cake layers wrapped well for up to 2 months; thaw completely before frosting and serving.

How to Serve

Serve this delicious recipe with your favorite sides.

FAQs

Can I use regular flour instead of gluten-free flour?

Yes, you can substitute regular all-purpose flour in a 1:1 ratio if you do not need the cake to be gluten-free. The texture and flavor will remain delicious.

How do I prevent blackberries from sinking in the batter?

Tossing blackberries in a bit of flour before folding them into the batter helps prevent them from sinking during baking by giving them a light coating that adheres better in the batter.