Name: Blackberry Lemon Cake with Blackberry Frosting
Prep time: 20 min
Cook time: 30 min
Total time: 50 min
Cuisine: American
Ingredients: 2 1/2 cups all-purpose flour; 1 1/2 teaspoons baking powder; 1/2 teaspoon baking soda; 1/4 teaspoon salt; 1/2 cup unsalted butter, softened; 1 cup granulated sugar; 2 large eggs; 1 teaspoon vanilla extract; 1 tablespoon lemon zest; 1/4 cup lemon juice; 1 cup buttermilk; 1/2 cup fresh blackberries, mashed; 1 cup fresh blackberries (for frosting); 1/2 cup unsalted butter, softened (for frosting); 3 cups powdered sugar; 2 tablespoons heavy cream; 1 teaspoon vanilla extract (for frosting); Pinch of salt

Why You’ll Love Blackberry Lemon Cake with Blackberry Frosting Recipe

Perfect balance of tart lemon and sweet blackberries
Soft and moist cake texture thanks to buttermilk
Naturally flavored frosting made with real blackberry puree
Beautiful natural purple hue without artificial coloring
Ideal for celebrations, birthdays, or afternoon tea
Easy-to-follow steps suitable for home bakers

Ingredients

(Tip: You’ll find the full list of ingredients and measurements in the recipe card below.)

For the Cake:

2 1/2 cups all-purpose flour
1 1/2 teaspoons baking powder
1/2 teaspoon baking soda
1/4 teaspoon salt
1/2 cup unsalted butter, softened
1 cup granulated sugar
2 large eggs
1 teaspoon vanilla extract
1 tablespoon lemon zest
1/4 cup lemon juice
1 cup buttermilk
1/2 cup fresh blackberries, mashed

For the Frosting:

1 cup fresh blackberries
1/2 cup unsalted butter, softened
3 cups powdered sugar
2 tablespoons heavy cream
1 teaspoon vanilla extract
Pinch of salt

Directions

Preheat your oven to 350°F (175°C). Grease and flour two 8-inch round cake pans to prevent sticking.

In a medium bowl, whisk together the flour, baking powder, baking soda, and salt until well combined.

In a large mixing bowl, cream the softened butter and granulated sugar together for about 3–4 minutes, until light and fluffy. Add the eggs one at a time, mixing thoroughly after each addition. Stir in the vanilla extract, lemon zest, and fresh lemon juice.

Gradually add the dry ingredients to the butter mixture, alternating with the buttermilk. Begin and end with the dry ingredients, mixing just until combined. Gently fold in the mashed blackberries to avoid overmixing.

Divide the batter evenly between the prepared cake pans. Bake for 25–30 minutes, or until a toothpick inserted into the center comes out clean.

Allow the cakes to cool in the pans for 10 minutes before transferring them to a wire rack to cool completely.

To prepare the frosting, place the blackberries in a small saucepan over medium heat. Cook for about 5 minutes until they break down. Mash thoroughly and strain through a fine mesh sieve to remove the seeds. Let the puree cool completely.

In a large bowl, beat the softened butter and powdered sugar until smooth and creamy. Add the cooled blackberry puree, heavy cream, vanilla extract, and a pinch of salt. Beat until light and fluffy.

Once the cake layers are fully cooled, spread frosting over the first layer, place the second layer on top, and frost the top and sides evenly. Garnish with fresh blackberries if desired.

Servings and timing

Prep Time: 20 minutes
Cooking Time: 30 minutes
Total Time: 50 minutes
Servings: 12 servings
Calories: Approximately 325 kcal per serving

Variations

For a more intense lemon flavor, add an extra teaspoon of lemon zest to the batter or a small amount of lemon extract.

You can substitute raspberries for blackberries to create a raspberry lemon cake variation.

For a lighter frosting option, fold a few tablespoons of whipped cream into the finished frosting for a softer texture.

Turn this recipe into cupcakes by dividing the batter into lined muffin tins and baking for 18–22 minutes.

Add a thin layer of lemon curd between the cake layers for an extra burst of citrus flavor.

Storage/Reheating

Store the frosted cake in an airtight container in the refrigerator for up to 4 days. Allow it to sit at room temperature for about 30 minutes before serving for the best texture and flavor.

If unfrosted, the cake layers can be wrapped tightly in plastic wrap and stored at room temperature for up to 2 days or frozen for up to 2 months.

To freeze the fully assembled cake, place it in the freezer uncovered until firm, then wrap tightly in plastic wrap and foil. Thaw overnight in the refrigerator before serving.

FAQs

Can I use frozen blackberries instead of fresh?

Yes, you can use frozen blackberries. Thaw and drain them well before mashing to prevent excess moisture in the batter.

What can I use if I don’t have buttermilk?

You can make a substitute by adding 1 tablespoon of lemon juice or vinegar to 1 cup of milk and letting it sit for 5 minutes.

How do I prevent the cake from turning purple?

Gently fold in the mashed blackberries and avoid overmixing to maintain a light, marbled appearance.

Can I make this cake ahead of time?

Yes, you can bake the cake layers a day in advance and frost them the next day.

How do I make the frosting thicker?

Add additional powdered sugar, a few tablespoons at a time, until the desired consistency is reached.

Can I make this recipe gluten-free?

Yes, substitute a 1:1 gluten-free baking flour blend for the all-purpose flour.

What size pans can I use if I don’t have 8-inch pans?

You can use 9-inch round pans, but the layers will be slightly thinner and may bake a few minutes faster.

How do I strain blackberry seeds effectively?

Press the cooked berries through a fine mesh sieve using the back of a spoon to extract smooth puree.

Can I reduce the sugar in this recipe?

You can slightly reduce the sugar in the cake, but doing so may affect texture and moisture.

Is this cake suitable for special occasions?

Absolutely. Its vibrant color, fresh flavors, and elegant presentation make it perfect for birthdays, showers, and summer celebrations.

Conclusion

Blackberry Lemon Cake with Blackberry Frosting is a refreshing, fruit-forward dessert that delivers both visual appeal and bright, balanced flavor. The combination of moist lemon cake and naturally tinted blackberry buttercream creates a bakery-worthy treat that’s surprisingly simple to make at home. Whether you’re baking for a celebration or simply indulging your love of berries, this cake is sure to impress.