The Best Swirled Blackberry-Lavender Sheet Cake Recipe Ever Made

Swirled blackberry-lavender sheet cake represents a delightful fusion of unexpected flavor combinations that dance across your palate.

Soft purple and deep berry hues create a visual masterpiece that hints at the culinary adventure awaiting you.

Delicate floral notes intertwine with rich fruit essence, revolutionizeing an ordinary dessert into an extraordinary experience.

The elegant swirls promise a sensory journey that balances sweetness with subtle herbal undertones.

Sophisticated yet approachable, this dessert breaks traditional baking boundaries with its innovative profile.

Layers of complex flavors invite you to savor each carefully crafted bite.

Why Swirled Blackberry-Lavender Sheet Cake Is a Dream

• Burst of Seasonal Flavor: The unique combination of blackberries and lavender creates a vibrant, sophisticated taste that captures the essence of summer gardens.
• Effortless Elegant Swirling: The simple knife-swirl technique transforms an ordinary sheet cake into a visually stunning dessert that looks professionally crafted without complex decorating skills.
• Versatile Celebration Centerpiece: Perfect for brunch gatherings, afternoon tea parties, or casual summer get-togethers, this cake offers a delightful balance of sweetness and floral undertones that impresses guests without requiring advanced baking expertise.
• Indulgent Yet Approachable: With its rich white chocolate frosting and homemade blackberry-lavender jam, the recipe delivers gourmet-level flavor while remaining accessible to home bakers of all skill levels.

Key Ingredients for Blackberry-Lavender Sheet Cake Magic

• Blackberries: Fresh, ripe berries that provide natural sweetness and vibrant color to the cake.
• Honey: Natural sweetener that adds depth and helps create a rich blackberry jam.
• Lemon Juice: Bright citrus that balances sweetness and helps set the jams consistency.
• Lavender: Delicate herb that introduces a subtle floral note to the blackberry mixture.

• Coconut Oil: Provides moisture and a subtle tropical undertone to the cake.
• Sour Cream: Ensures a tender, soft cake texture with rich tanginess.
• Eggs: Binding agent that helps structure the cake and adds richness.
• Sugar: Primary sweetener that contributes to the cakes overall flavor and texture.
• Vanilla Extract: Adds warm, classic flavor that complements other ingredients.
• All-Purpose Flour: Main structural ingredient for the cakes foundation.
• Baking Soda, Baking Powder: Leavening agents that help the cake rise and become fluffy.
• Salt: Enhances and balances the cakes overall flavor profile.
• Milk: Adds moisture and helps create a smooth, consistent batter.

• Butter: Creamy base for the frosting that provides rich flavor and smooth texture.
• Powdered Sugar: Creates smooth, light frosting with perfect sweetness.
• White Chocolate: Adds richness and creates a luxurious frosting finish.
• Vanilla Extract: Rounds out the frostings flavor with warm, classic notes.

How to Bake a Gorgeous Swirled Sheet Cake

Step 1: Prepare Blackberry Lavender Jam

• Combine blackberries
• Honey
• Lemon juice
• Lavender

Heat ingredients in a medium pot until boiling. Mash berries with a fork or potato masher. Continue cooking until mixture reduces by 1/3. Let cool completely – the jam will thicken more as it sits.

Step 2: Prep Baking Setup

Preheat oven to 350°F. Line a 9×13 inch baking dish with parchment paper. Ensure all ingredients are at room temperature for perfect mixing.

Step 3: Mix Wet Ingredients

• Coconut oil
• Sour cream
• Eggs
• Sugar
• Vanilla extract

Whisk until ingredients are completely smooth and well incorporated.

Step 4: Combine Dry Ingredients

• All-purpose flour
• Baking soda
• Baking powder
• Salt

Stir gently to avoid overmixing, which can make the cake tough.

Step 5: Add Milk

Slowly pour milk into batter, mixing until you achieve a silky smooth consistency with no lumps.

Step 6: Pour Cake Batter

Transfer batter to prepared baking dish. Spread evenly across the entire surface using a spatula.

Step 7: Create Jam Swirls

Dollop 1/2 to blackberry lavender jam across the batter. Use a knife to create beautiful swirling patterns throughout the cake.

Step 8: Bake to Perfection

Slide cake into preheated oven. Bake for 30-35 minutes until top turns golden brown and a toothpick inserted comes out clean.

Step 9: Cool Completely

Remove cake from oven and let it cool entirely. This ensures frosting will stick perfectly and flavors will settle.

Step 10: Prepare Creamy Frosting

• Softened butter
• Powdered sugar

Continue until mixture becomes light and fluffy.

Step 11: Finish Frosting

• White chocolate pieces
• Vanilla extract

Beat until frosting becomes smooth and creamy.

Step 12: Frost the Cake

Spread a thin layer of reserved jam over cooled cake. Top with whipped frosting, covering entire surface evenly.

Step 13: Final Decorative Touch

Create artistic swirls with remaining jam on top of frosting. This adds a beautiful visual appeal that will impress your guests.

Tips for Perfect Blackberry-Lavender Cake Every Time

• Mash Berries Thoroughly: Crush blackberries completely to release maximum flavor and create a smooth, consistent jam texture that swirls beautifully through the cake.
• Control Moisture Carefully: Ensure blackberry mixture reduces enough to prevent excess liquid from making the cake soggy or preventing proper setting.
• Swirl with Gentle Technique: Use a knife's tip to create delicate, soft swirls without overmixing the jam into the batter, maintaining distinct color and flavor patterns.
• Check Cake Doneness Precisely: Test cake's readiness by inserting a toothpick in the center; it should come out clean with just a few moist crumbs attached.
• Chill Before Frosting: Let the cake cool completely at room temperature, then refrigerate briefly to help frosting set smoothly and prevent melting during application.

Storing and Reheating Swirled Sheet Cake the Right Way

• Refrigeration: Store cake in an airtight container and keep chilled for up to 5 days. Cover tightly with plastic wrap or place inside a sealed container to prevent drying out and absorbing other refrigerator odors.
• Room Temperature: Leave cake at room temperature for no more than 2 hours after serving to maintain optimal freshness and prevent bacterial growth. Consume within 24 hours for best taste and texture.
• Reheating: Warm individual slices gently in the microwave for 10-15 seconds on low power. Avoid overheating to prevent drying out the delicate cake texture. Alternatively, let cake sit at room temperature for 15-20 minutes before serving to restore its soft, moist consistency.

What Goes Well with Blackberry-Lavender Cake

• Pair with Lavender Lemonade: Craft a refreshing drink mirroring the cake's lavender notes, blending fresh lemon juice, honey, and subtle lavender syrup for a complementary flavor experience.
• Serve alongside Creamy Goat Cheese: The tangy, smooth cheese balances the cake's sweetness, creating a delightful contrast that elevates the dessert's complex berry and floral undertones.
• Match with Chamomile Tea: This delicate, herbal tea harmonizes beautifully with the cake's lavender and blackberry elements, offering a soothing and elegant accompaniment to each bite.
• Complement with Vanilla Bean Ice Cream: A classic vanilla scoop provides a cool, creamy texture that enhances the cake's rich, fruity profile and adds a luxurious finishing touch.

New Ways to Savor Swirled Blackberry-Lavender Cake

• Berry Bliss Remix: Swap blackberries for fresh raspberries and use rose water instead of lavender for a romantic flavor profile that adds elegant complexity to the sheet cake.
• Citrus Tropical Escape: Replace blackberry jam with passion fruit puree and add orange zest to the batter for a bright, sunny cake that transports taste buds to tropical destinations.
• Autumn Comfort Cake: Incorporate diced apples and cinnamon into the batter, using a maple-infused jam swirl that brings warm, cozy notes perfect for crisp fall afternoons.
• Nutty Wellness Version: Mix ground almonds into the flour base, use honey instead of sugar, and sprinkle toasted chopped pecans on top for a nutritious, protein-rich dessert option.

Swirled Blackberry-Lavender Sheet Cake Recipe

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4.6 from 38 reviews

• Total Time: 1 hour
• Yield: 12 1x

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Description

Swirled Blackberry-Lavender Sheet Cake brings elegant French countryside charm to classic American desserts. Delicate lavender notes dance with juicy blackberries, creating a sophisticated rectangular treat perfect for summer gatherings where you’ll impress friends with this stunning bakery-quality confection.

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Ingredients

Scale 1x2x3x

Fruits and Flavoring:

• 6 cups (1.4 kg) fresh or frozen blackberries
• 1–2 tablespoons (4–8 g) dried lavender
• 1 tablespoon (15 ml) lemon juice
• 1 tablespoon (15 ml) vanilla extract

Dry Ingredients:

• 3 cups (375 g) all-purpose flour
• 1 ½ cups (300 g) granulated sugar
• 1 ½ cups (180 g) powdered sugar
• 1 teaspoon (6 g) kosher salt
• ½ teaspoon (2.5 g) baking soda
• 1 ½ teaspoons (7.5 g) baking powder

Wet Ingredients and Fats:

• 3 large eggs
• 1 cup (240 ml) milk
• 1 cup (240 ml) melted coconut oil
• ½ cup (120 ml) sour cream
• 16 tablespoons (226 g) salted butter, at room temperature
• ½ cup (170 g) honey
• 6 ounces (170 g) white chocolate, melted and cooled

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Instructions

1. Craft a luscious blackberry and lavender compote by combining fresh blackberries, pure honey, zesty lemon juice, and delicate lavender in a medium saucepan. Simmer the mixture until boiling, then gently crush the berries using a fork or potato masher.
2. Continue cooking until the compote reduces and thickens by approximately one-third, creating a rich, concentrated fruit sauce. Set aside to cool, understanding the mixture will further condense as it rests.
3. Preheat the oven to 350°F (175°C) and meticulously line a 9×13 inch (23×33 centimeter) baking dish with parchment paper, ensuring complete coverage of the bottom and sides.
4. In a spacious mixing bowl, whisk together melted coconut oil, creamy sour cream, farm-fresh eggs, granulated sugar, and pure vanilla extract until the mixture becomes uniformly smooth and well-integrated.
5. Sift together all-purpose flour, baking soda, baking powder, and a pinch of kosher salt, then gradually fold these dry ingredients into the wet mixture, stirring minimally to prevent overmixing.
6. Slowly incorporate whole milk into the batter, stirring gently to maintain a silky, lump-free consistency that promises a tender cake texture.
7. Transfer the batter into the prepared baking dish, using a spatula to distribute it evenly across the surface, creating a level base for the swirled design.
8. Dollop approximately 1/2 to of the prepared blackberry-lavender compote onto the cake batter, using the tip of a knife to create elegant, meandering swirls throughout the surface.
9. Slide the baking dish into the preheated oven and bake for 30 to 35 minutes, watching for a golden-brown top and a clean toothpick test that indicates perfect doneness.
10. Remove the cake from the oven and allow it to cool completely on a wire rack, which prevents moisture buildup and ensures a stable frosting application.
11. Prepare the white chocolate frosting by whipping softened unsalted butter until it becomes light and fluffy, then gradually incorporate powdered sugar for a smooth, creamy consistency.
12. Melt white chocolate pieces and blend them into the frosting along with a splash of vanilla extract, creating a luxurious, glossy topping that will complement the cake’s fruity undertones.
13. Once the cake has cooled, spread a thin layer of the reserved blackberry-lavender compote across the surface as a flavor-enhancing base layer.
14. Generously spread the white chocolate frosting over the entire cake, using an offset spatula to achieve a smooth, even coverage.
15. For a final artistic touch, drizzle and swirl additional compote across the frosted surface, creating an visually stunning dessert that promises to delight both the eyes and the palate.

Notes

• Crafting this dessert celebrates summer’s bounty with an elegant twist of lavender-infused blackberry magic.
• Homemade jam provides rich depth and transforms an ordinary sheet cake into a sophisticated culinary experience.
• Creating swirls requires gentle knife movements, ensuring beautiful marbling throughout the cake’s surface.
• Cooling time allows flavors to meld and texture to settle, enhancing overall taste and presentation.
• Storing leftover cake in refrigerator maintains freshness and preserves delicate lavender and blackberry notes.

• Prep Time: 25 minutes
• Cook Time: 35 minutes
• Category: Desserts
• Method: Baking
• Cuisine: American

Nutrition

• Serving Size: 12
• Calories: 473 kcal
• Sugar: 41 g
• Sodium: 312 mg
• Fat: 26 g
• Saturated Fat: 16 g
• Unsaturated Fat: Not specified g
• Trans Fat: Not specified g
• Carbohydrates: 58 g
• Fiber: Not specified g
• Protein: 4 g
• Cholesterol: 75 mg