The Ultimate Blueberry Jam Cake: A Deliciously Moist and Flavorful Dessert

If you’re looking for a show-stopping dessert that’s bursting with flavor, this Blueberry Jam Cake is the perfect choice. With its tender vanilla layers, luscious homemade blueberry jam filling, and creamy cream cheese frosting, this cake is a true masterpiece. Whether you’re baking for a special occasion or just craving something sweet, this Blueberry Jam Cake will impress everyone at the table.

In this comprehensive guide, we’ll walk you through every step of making this Blueberry Jam Cake, from preparing the moist vanilla cake layers to crafting the perfect blueberry jam filling and frosting. Plus, we’ll share expert tips to ensure your cake turns out perfectly every time.

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Why You’ll Love This Blueberry Jam Cake

✅ Moist and Fluffy Vanilla Cake – Made with buttermilk and sour cream for an ultra-tender crumb.
✅ Homemade Blueberry Jam Filling – Fresh blueberries cooked down into a sweet, tangy jam.
✅ Creamy Cream Cheese Frosting – The perfect balance of richness and tang to complement the cake.
✅ Stunning Presentation – A beautiful layered cake topped with fresh blueberries.
✅ Perfect for Any Occasion – Ideal for birthdays, holidays, or afternoon tea.

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Ingredients for Blueberry Jam Cake

Before we dive into the recipe, let’s gather all the ingredients you’ll need for this Blueberry Jam Cake.

Vanilla Cake Layers

▢ 3 1/2 cups Cake flour
▢ 1/4 cup Cornstarch
▢ 2 tsp Baking powder
▢ 1 tsp Baking soda
▢ 1 tsp Salt
▢ 1 cup Unsalted butter, room temperature
▢ 3 TBSP Canola or vegetable oil
▢ 1 1/2 cups White granulated sugar
▢ 4 Large eggs, room temperature
▢ 1 TBSP Pure vanilla extract
▢ 1 cup Sour cream, room temperature
▢ 1 cup Buttermilk, room temperature

Homemade Blueberry Jam

▢ 3 cups Blueberries (fresh or frozen)
▢ 3/4 cup White granulated sugar

Cream Cheese Frosting

▢ 2 cups Unsalted butter, room temperature
▢ 12 oz Cream cheese, room temperature
▢ 4 cups Powdered sugar, sifted
▢ 1 tsp Pure vanilla extract
▢ 1 cup Fresh blueberries (for decorating)

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Step-by-Step Instructions for Blueberry Jam Cake

Step 1: Preheat and Prepare Cake Pans

1. Preheat your oven to 350°F (175°C).

2. Spray three 8-inch cake pans with non-stick baking spray.

3. Place an 8-inch parchment paper circle at the bottom of each pan and spray again to ensure easy release.

Step 2: Mix Dry Ingredients

1. In a medium bowl, sift together cake flour, cornstarch, baking powder, baking soda, and salt.

2. Set aside.

Step 3: Cream Butter, Oil, and Sugar

1. Using a stand mixer or hand mixer, beat the butter, oil, and sugar on high speed for 2 minutes until light and fluffy.

2. Scrape down the bowl to ensure even mixing.

Step 4: Add Wet Ingredients

1. Add the eggs, vanilla extract, and sour cream, mixing on medium speed until fully combined.

Step 5: Alternate Dry Ingredients and Buttermilk

1. Add half of the dry ingredients and half of the buttermilk. Mix on low speed until just combined.

2. Repeat with the remaining dry ingredients and buttermilk.

Step 6: Divide and Bake

1. Divide the batter evenly among the three prepared cake pans.

2. Bake for 21-24 minutes, or until a toothpick inserted comes out with moist crumbs.

3. Let the cakes cool in the pans for 10 minutes, then transfer to a wire rack to cool completely.

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How to Make Homemade Blueberry Jam

Step 1: Cook Blueberries and Sugar

1. In a medium saucepan, combine blueberries and sugar.

2. Cook over medium heat, stirring occasionally, until the sugar dissolves and the mixture thickens (about 10-15 minutes).

Step 2: Cool Before Using

1. Pour the jam into a glass measuring cup and let it cool completely before assembling the cake.

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Cream Cheese Frosting for Blueberry Jam Cake

Step 1: Beat Butter and Cream Cheese

1. Using a mixer, beat the butter and cream cheese on high speed for 2 minutes until smooth.

Step 2: Gradually Add Powdered Sugar

1. Add half of the powdered sugar, mixing on low speed.

2. Add the remaining powdered sugar and vanilla, then beat on high until creamy.

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Assembling the Blueberry Jam Cake

Step 1: Layer Cake and Frosting

1. Place the first cake layer on a cake stand or plate.

2. Spread 3/4 cup frosting over the cake, then pipe a frosting border around the edges.

3. Spoon half of the blueberry jam into the center.

Step 2: Repeat Layers

1. Add the second cake layer and repeat the frosting and jam process.

2. Place the third cake layer upside down for a flat top.

Step 3: Crumb Coat and Final Frosting

1. Apply a thin crumb coat of frosting and freeze for 15 minutes.

2. Frost the entire cake with the remaining frosting.

Step 4: Decorate with Blueberries

1. Top the cake with fresh blueberries for a beautiful finish.

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The Perfect Vanilla Cake Layers for Blueberry Jam Cake

A Blueberry Jam Cake starts with a moist, tender vanilla cake that serves as the foundation for the layers. The key to achieving the perfect texture lies in the ingredients and techniques used. Here’s how to make the best vanilla cake layers for your Blueberry Jam Cake.

Why This Vanilla Cake Works

This recipe uses a combination of cake flour, buttermilk, and sour cream to create a light yet rich crumb. Cake flour has a lower protein content than all-purpose flour, resulting in a softer, more delicate texture. Meanwhile, buttermilk and sour cream add moisture and a slight tang that balances the sweetness.

Step-by-Step Instructions

1. Preheat and Prepare Pans

   • Preheat your oven to 350°F (175°C).

   • Grease three 8-inch cake pans with non-stick spray and line the bottoms with parchment paper.

2. Mix Dry Ingredients

   • In a bowl, sift together cake flour, cornstarch, baking powder, baking soda, and salt.

   • Sifting ensures a lighter texture and prevents lumps.

3. Cream Butter, Oil, and Sugar

   • Using a mixer, beat butter, oil, and sugar on high for 2 minutes until light and fluffy.

   • The oil helps keep the cake moist, while butter adds richness.

4. Add Eggs and Vanilla

   • Mix in eggs one at a time, followed by vanilla extract and sour cream.

   • Room-temperature ingredients blend more smoothly.

5. Alternate Dry Ingredients and Buttermilk

   • Add half of the dry ingredients, mix, then half of the buttermilk. Repeat.

   • Mixing on low speed prevents overmixing, which can make the cake dense.

6. Bake and Cool

   • Divide batter evenly into pans and bake for 21-24 minutes.

   • Let cakes cool in pans for 10 minutes, then transfer to a wire rack.

Pro Tips for Success

✔ Use a kitchen scale for precise measurements.
✔ Don’t overmix—stop as soon as ingredients are combined.
✔ Cool cakes completely before frosting to prevent melting.

This vanilla cake is the perfect base for your Blueberry Jam Cake, providing a soft, buttery flavor that pairs beautifully with the jam and frosting.

 Homemade Blueberry Jam Filling

The star of the Blueberry Jam Cake is the luscious homemade blueberry jam filling. Unlike store-bought jam, this version is fresher, less sugary, and packed with real fruit flavor. Here’s how to make it.

Why Make Your Own Blueberry Jam?

• No artificial preservatives – Just blueberries and sugar.

• Customizable sweetness – Adjust sugar to taste.

• Thicker consistency – Perfect for layering without making the cake soggy.

Step-by-Step Instructions

1. Cook Blueberries and Sugar

   • In a saucepan, combine 3 cups blueberries and 3/4 cup sugar.

   • Cook over medium heat, stirring occasionally, until the sugar dissolves.

2. Simmer Until Thickened

   • As the mixture heats, the blueberries will break down and release juices.

   • Continue cooking for 10-15 minutes until it thickens to a jam-like consistency.

3. Cool Before Using

   • Transfer to a glass container and let it cool completely (about 30 minutes).

   • If the jam is too runny, simmer longer; if too thick, add a splash of water.

Variations & Tips

✔ Add lemon juice (1 tbsp) for a tangy twist.
✔ Mash blueberries for a smoother jam or leave some whole for texture.
✔ Store extra jam in the fridge for up to 2 weeks.

This homemade blueberry jam adds a burst of fruity flavor to every bite of your Blueberry Jam Cake, making it irresistibly delicious.

 Cream Cheese Frosting & Assembly

The final touch to your Blueberry Jam Cake is a rich, creamy cream cheese frosting that balances the sweetness of the jam. Here’s how to make it and assemble the cake like a pro.

Why Cream Cheese Frosting?

• Tangy flavor – Cuts through the sweetness of the cake and jam.

• Smooth texture – Perfect for piping and spreading.

• Stable structure – Holds up well when layered.

Step-by-Step Frosting Instructions

1. Beat Butter and Cream Cheese

   • Using a mixer, beat 2 cups butter and 12 oz cream cheese until smooth and fluffy (about 2 minutes).

2. Gradually Add Powdered Sugar

   • Sift in 4 cups powdered sugar in two batches, mixing on low speed to avoid a sugar cloud.

3. Add Vanilla for Flavor

   • Mix in 1 tsp vanilla extract and beat on high until light and creamy.

Assembling the Blueberry Jam Cake

1. First Layer

   • Place a cake layer on a stand, spread 3/4 cup frosting, and pipe a frosting border.

   • Fill the center with half of the blueberry jam.

2. Second Layer

   • Repeat the process with the second layer.

3. Final Layer & Crumb Coat

   • Place the third layer upside down for a flat top.

   • Apply a thin crumb coat and freeze for 15 minutes.

4. Final Frosting & Decoration

   • Frost the entire cake and top with fresh blueberries.

Serving & Storage Tips

✔ Chill before slicing for cleaner cuts.
✔ Store in the fridge for up to 5 days.
✔ Bring to room temperature before serving for the best texture.

Expert Tips for the Best Blueberry Jam Cake

✔ Use Room Temperature Ingredients – Ensures a smooth batter and frosting.
✔ Don’t Overmix the Batter – Overmixing can lead to a dense cake.
✔ Cool Jam Completely – Prevents it from melting the frosting.
✔ Chill Cake Before Frosting – Makes it easier to decorate.

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Frequently Asked Questions (FAQs)

Can I Use Store-Bought Blueberry Jam?

Yes, but homemade jam has a fresher, more vibrant flavor.

How Do I Store Blueberry Jam Cake?

Store in the refrigerator for up to 5 days due to the cream cheese frosting.

Can I Freeze This Cake?

Yes! Freeze unfrosted layers for up to 3 months. Thaw before decorating.

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Final Thoughts on Blueberry Jam Cake

This Blueberry Jam Cake is a moist, flavorful, and visually stunning dessert that’s perfect for any occasion. The combination of vanilla cake, homemade blueberry jam, and cream cheese frosting creates a harmonious balance of sweetness and tang.