Lemon Berry Mascarpone Cake With Lemon Buttercream Frosting

Blue's Best Life
by Blue's Best Life
12 servings
1 hr 10 min

This light lemon berry mascarpone cake is the prefect dessert for a special occasion. This cake's delicate texture is the perfect match to the light lemony buttercream frosting! Make this beautiful cake for a bridal shower, Mother's Day or even Easter!

Why This Lemon Cake is the Best!

In the past, layer cakes were a bit intimidating to me. Frosting the cake and decorating it so that it looks beautiful had been something I thought should be left to the professional bakers.

However, after making a few different desserts for birthdays and holidays, I decided my baking skills had improved and I needed to get passed this fear of layer cakes! And I must say this cake recipe turned out delicious and beautiful!

Blueberries and lemon are a wonderful dessert combination. This cake has such a lovely lemon flavor and a perfect moist texture thanks to the mascarpone cheese. It's bursting with sweet juicy blueberries in every bite.

Add the sweet, tangy lemon buttercream frosting for a dessert that is worthy for a special occasion. This is the perfect spring time dessert for graduations or birthdays. Or "wow" Mom with a special homemade dessert for Mother's Day! Whatever the occasion, this dessert will definitely be the main attraction.

Key Ingredients

mascarpone cheese- mascarpone cheese is a creamy sweet tasting cheese originating in Italy. It can be found in your local grocery store with the specialty cheeses. It is sold in a tub style container.

lemon juice -you will need zest and fresh lemon juice for this recipe so buy lemons and do not used bottled juice.

blueberries- I use fresh blueberries, but you can use frozen if you prefer. Do not defrost the frozen berries, just add straight to the batter.

What Is Mascarpone?

Mascarpone is a cheese that originated in Italy. It is made from just 2 ingredients, heavy cream and citric acid. The result is a smooth creamy cheese texture similar to cream cheese, but with a sweeter taste. Because of its texture and flavor it works well when added to baked goods similarly to sour cream or cream cheese.

Step-By-Step Instructions

The first step to making your cake is to grease, flour and line the round cake pans. I like to use butter to generously grease the pans but you can also use cooking spray. Then cut out parchment paper to fit the bottom of your pans. If you are new to baking, check out the step-by-step guide on how to grease a cake pan.

Preheat your oven to 325 degrees Fahrenheit. In a large bowl whisk together the flour, baking powder and salt. Set the flour mixture aside.

In the bowl of a stand mixer using a paddle attachment beat the mascarpone until smooth. Add the vegetable oil and sugar and continue beating for 1-2 minutes.

Mixing the dry ingredients in a separate bowl. Mixing the sugar and vegetable oil together with the mascarpone cheese.

Add the eggs, one at a time, and continue to mix until smooth. Add the tablespoon of lemon juice along with the lemon zest. With the mixer on low, alternately add half of the flour and milk to the wet ingredients and repeat with the remaining flour and milk. Continue mixing until just combined, about 20-30 seconds. Remove the paddle attachment and use a spatula scrape the sides of the mixer bowl to make sure all of the flour is thoroughly combined. The cake batter will be slightly thick. Add the blueberries and use the spatula to carefully stir into the batter.

Adding the egg to the batter and the blueberries to the lemon cake.

Divide batter into the two prepared pans. Place the cake pans in the preheated oven on the middle rack. Set the timer for 35 minutes so that you can check the cake a few minutes before the recommended baking time.

I always test my baked goods with a toothpick sooner than suggested because all oven temperatures vary. Insert the toothpick or a cake tester in the center of the cake. When removed look for the toothpick to be clean and free of any crumb. If it is not then continue baking and check every 2-3 minutes.

When the cake has finished baking, remove from the oven and place cakes on a cooling rack to cool for 10 minutes before inverting on the wire rack. Allow the cake to completely cool before frosting the cake.

Adding the batter to the cake pan. The mascarpone cake cooling on a wire rack.
Decorating Tips

When the cake has cooled start the lemon buttercream frosting. This frosting is light and lemony with the perfect flavor from the lemon juice and lemon zest. Using a stand mixer or a hand held electric mixer with either a paddle or whisk attachment, beat the room temperature butter until smooth and creamy. Add a cup of the powder sugar along with the lemon juice and lemon zest and continue mixing on low speed. Add a half a cup of powdered sugar at a time while mixing until the frosting is a smooth consistency. You will need about 3 to 3 ½ cups of powdered sugar.

Use an icing spatula or offset spatula to spread the frosting on the cakes. If you do not own these tools, you can always use a regular spatula. I did for years until I added to my baking tools. Your cake may not look completely professional, but it will still taste amazing!

Add a generous amount of cake frosting to the center of one the first cake layer and spread the frosting out as evenly as possible. Remember we are stacking this so we want a good base. Next add the second cake layer. Add more frosting to the top of the cake and continue to smooth across the top and the edges of the cake. If you have a bench scraper, this will help make the side look very even. If you have not frosted a cake before check out this tutorial for complete instructions on how to crumb coat a cake and frost it perfectly. This will give you the best results for frosting a layer cake.

Once your cake is frosted, you can decorate the top of the cake with fresh berries, lemon slices and lemon twists. I like to do this right before I serve the cake so that it looks fresh.

Creaming the butter in the stand mixer and frosting the cake.
Storage Suggestions

The good news is that you do not have to find room in the refrigerator for this large cake. Cakes with a buttercream icing can sit at room temperature for up to 3 days.

If you want to store it longer, you can place it in the refrigerator uncovered just long enough for the icing to harden so that you can loosely wrap it with plastic wrap.

You can also freeze the cake unfrosted. Make sure that it has cooled completely. Wrap in plastic wrap and a layer of aluminum foil. Always label it and include the date. Freeze for up to 3 months.

The lemon berry cake on a white cake stand.
Expert Tips

  • Always use room temperature ingredients. Cold eggs, butter and mascarpone will not mix together well. This will cause lumpy batter that will not give you the light and fluffy cake texture you are looking for.
  • Use fresh squeezed lemon juice.
  • If using frozen berries, do not thaw. Add the frozen blueberries to the batter.
  • Cool the cake completely before adding the buttercream icing.
A slice of blueberry lemon cake.
looking For Other Dessert Ideas? Try These!

Strawberry Banana Pudding

Cinnamon Bread Pudding {with Cinnamon Bourbon Sauce}

Easy Peach Galette Recipe with Puff Pastry

Easy Peach Cobbler With Puff Pastry Recipe

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Lemon Berry Mascarpone Cake With Lemon Buttercream Frosting
Recipe details
  • 12  servings
  • Prep time: 30 Minutes Cook time: 40 Minutes Total time: 1 hr 10 min
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Lemon Blueberry Cake
  • 3 cups all-purpose flour
  • 1 tablespoon baking powder
  • 1 teaspoon salt
  • 8 ounces mascarpone
  • 1 cup vegetable oil
  • 1 3/4 cup sugar
  • zest of 1 lemon
  • 1 tablespoon lemon juice, fresh squeezed
  • 1 cup whole, milk
  • 3 eggs
  • 1 and 1/2 cups fresh or frozen blueberries
Lemon Buttercream Frosting
  • 1 cup butter (2 sticks)
  • 3 1/2- 4 cups powdered sugar
  • 2 tablespoons lemon juice
  • 1 teaspoon lemon zest
Lemon Blueberry Cake
Preheat oven to 325 degrees Fahrenheit. Grease and flour two 8 inch round cake pans and line with parchment paper.
In a small bowl, whisk together the flour, baking powder and salt.
In the bowl of a stand mixer, using the paddle attachment beat the mascarpone until smooth and creamy. Add the vegetable oil and sugar and continue to mix for another 2 minutes.
With the mixer on, add the lemon zest and lemon juice. Next add the eggs one at a time. Scrape the sides of the mixer to insure all ingredients are incorporated and mix for another 2 minutes.
Once both eggs are added, add half of the flour and half of the milk. Mix well before adding the remaining flour and milk. Be careful to not overmix.
Remove the paddle attachment and stir in the blueberries with a spatula.
Divide the batter between two cake pans. Place the pans on the middle rack and time for 35 minutes. Check with a toothpick for doneness. Depending on oven cakes may take up to 40 minutes.
Remove the cakes from oven. Place on a wire rack and cool for 10 minutes before inverting from the cake stand to finish cooling. Wait until completely cooled to frost the cake.
Lemon Buttercream
In the bowl of a stand mixer with either a paddle or whisk attachment, beat the softened butter on medium speed until smooth and creamy.
While the mixer is running on low speed, add the powdered sugar in small increments along with the lemon juice and zest.
Gradually increase the speed and mix for 3 minutes. If the frosting is too thin add another ¼ to ½ cup of powdered sugar. If the mixture is too thick add a few extra drops of lemon juice.
Assembling the Cake
Transfer the first cake layer to a cake stand or plate. Add about ¾ of a cup to the top of the cake and use your spatula to spread in an even layer.
Place the second layer on top of the frosted layer. Add more frosting to the top and smooth the frosting down the edges and the side of the cake. Use a bench scraper to remove any excess frosting. Decorate with berries and lemon slices or pipped design if desired.
  • *Cakes with a buttercream frosting can be left at room temperature for up to 3 days.
  • For longer storage the cake can be refrigerated uncovered long enough to harden the frosting and then loosely cover with plastic wrap.
  • The unfrosted cake layers can be frozen for up to 3 months.  Wrap completely cooled cakes in a layer of plastic wrap and aluminum foil.
Blue's Best Life
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  • Shirley Shirley on Dec 11, 2022

    Hello, In Step 5 of the instructions it says “once both eggs are added” implying two eggs, but the ingredients lists 3 eggs. Is it two eggs or three eggs. Thank you.

  • Lena Lena on Jan 11, 2023

    I oticed he discrepancy in the number of eggs,also. - please clarify