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    Home » Recipes » Fillings and Frostings

    Published: Apr 27, 2022 by Amy · This post may contain affiliate links. If you make a purchase through links on my site, I may earn a commission (see disclosure).

    Easy Blueberry Compote Cake & Cupcake Filling

    This bakery recipe makes a simple blueberry compote cake and cupcake filling that is bursting with fresh blueberry flavor. But here's the bakery secret--it's made with frozen blueberries so you can make it all year round!

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    5 from 16 votes
    Jump to Recipe Jump to Video
    a vanilla cupcake with blueberry cupcake filling and a bowl of blueberry compote filling in the background this Post
    Jump to:
    • ⭐ How to make a quick compote filling
    • 📋 Ingredients
    • 🎥 Quick step-by-step VIDEO
    • 🧁 Pairing it with cake and cupcake flavors
    • 💭 Frequently Asked Questions
    • 📖 Recipe
    • 💬 Comments

    ⭐ How to make a quick compote filling

    Most people are surprised to learn how easy it is to make a super fresh-tasting fruit compote with frozen blueberries! Frozen fruit is typically frozen when the fruit is at its ripest, giving you the same fresh blueberry flavor as ripe blueberries picked off the vine.

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    All you need to do is cook the recipe's four ingredients in a non-stick frying pan until the fruit is softened and the filling is thick--you'll have it done within 15 minutes! Once the blueberry compote cools, you'll have a delicious filling with a lovely texture for all your cakes and cupcakes.

    If you love this blueberry compote filling, you'll love my other cake and cupcake fillings, including my raspberry, strawberry, and mixed berry compotes.

    📋 Ingredients

    This quick filling is made of only 4 ingredients:

    • Frozen Blueberries--I love keeping frozen blueberries on hand so I can enjoy this filling any time of the year, but if you'd like to use fresh blueberries, scroll down to my recommendations within the recipe FAQ section.
    • Either Cornstarch or Instant Clearjel--Cornstarch requires heat to thicken, while instant clearjel is a modified cornstarch that thickens instantly. Both work great in this recipe--just follow the instructions within the recipe card that pertain to the thickener you choose to use.
    • Sugar
    • Lemon Juice--either fresh or bottled is fine! I use bottled.

    🎥 Quick step-by-step VIDEO

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    • Check it out on Youtube
    • Watch the shorter version on Tiktok or Instagram

    🧁 Pairing it with cake and cupcake flavors

    This recipe would make a lovely blueberry cake filling for all vanilla flavors like my most popular vanilla almond cake or vanilla bean cake. Or use it to fill my lemon drizzle cake for a "blueberry lemonade" variety.

    In addition, this recipe works perfectly as a blueberry cupcake filling for my moist vanilla cupcakes. It gives each cupcake a burst of blueberry flavor in every bite.

    A slice of fresh blueberry cake with blueberry cake filling and blueberry buttercream
    This Fresh Blueberry Cake recipe uses blueberry compote in the cake batter and as a filling.

    💭 Frequently Asked Questions

    Can I use fresh blueberries instead of frozen?

    Sure! You may substitute fresh blueberries if they are in season in equal parts (I suggest using the grams measurements). However, you may wish to decrease your choice of thickener slightly (For instance, I'd start by decreasing the cornstarch from 2 Tablespoons to to 1 ½ Tablespoons, as fruit that is frozen typically releases more juice than fruit that is fresh).

    Is it blueberry season and you find yourself with a ton of fresh blueberries? (We love going to berry farms in my family). Pop the washed berries in a freezer bag and use them to make this blueberry filling in the future!

    How long can this blueberry cupcake filling last?

    It lasts up to two weeks in the fridge, or freeze it for longer. Compote made with cornstarch can separate slightly the longer it sets in the fridge--simply stir it before using. This is typically not an issue with compotes made with Instant Clearjel.

    Can you freeze this filling?

    Yes, it freezes well in an airtight container, although I typically freeze the entire cake once I have filled and either crumb-coated or completed my layer cake. I talk about this more in How to Bake and Layer Cakes Like a Pro. With super moist cake recipes and this delicious blueberry filling recipe, you'd never even know it was frozen!

    What's the best way to fill a cake with fruit filling?

    Darker colored cake fillings can discolor certain lighter cake flavors, so I recommend spreading a thin layer of buttercream on top of your bottom cake layer, then pipe a ½" tall ring of buttercream around the outside of the cake. Evenly spread the filling within the ring, making sure it is not taller than the ring of buttercream. You can see it more clearly at the end of the recipe video.

    What's the easiest way to fill a cupcake?

    I highly recommend an affordable cupcake corer when filling cupcakes (it will save you a lot of time and cuts out the perfect center). But you can also just use a sharp paring knife to cut out the center of the cupcake, about ¾" deep. After you fill it with the blueberry cupcake filling, top the cupcake with the cored-out cake before frosting it.

    I hope you enjoy this delicious blueberry filling as much as I do!

    Thanks for Reading. ❤️

    Amy's Signature

    📖 Recipe

    a vanilla cupcake with blueberry cupcake filling and a bowl of blueberry compote filling in the background
    Save this Recipe Saved!

    Easy Blueberry Compote Cake & Cupcake Filling

    5 from 16 votes

    This simple and delicious blueberry cake and cupcake filling is bursting with fresh blueberry flavor. It's made with only four ingredients, including frozen blueberries, so you can enjoy it year-round.
    A 1x batch will fill one 6" three-layer cake or about 14 cupcakes and a 2x batch will fill one 8" three-layer cake or about 28 cupcakes.
    👩‍🍳 For the most accurate baking results, use the grams measurements with a kitchen scale. Watch the quick recipe video
    Servings 1 heaping cup(s)
    Prep Time5 minutes mins
    Cook Time10 minutes mins
    Print Recipe Pin Recipe

    Equipment

    nonstick skillet
    heavy-duty spatula
    kitchen scale

    Ingredients

    Thickener Ingredients

    • 2 Tablespoons Cornstarch or 2 ½ Tablespoons instant clearjel (See Note # 1 for the differences)
    • 100 grams (½ cup) Sugar

    Remaining Compote Ingredients

    • 8 ounces (227 grams, around 2 cups) Frozen Blueberries (I love frozen wild blueberries for their small size, but any frozen unsweetened blueberries will work great)
    • 1 ½ Tablespoons Lemon Juice (I use bottled)

    Instructions

    • Whisk the sugar and your choice of 2 Tablespoons Cornstarch or 2 ½ Tablespoons Instant Clearjel together in a small bowl. Set aside.
    • Combine the frozen blueberries and lemon juice in a nonstick skillet or saucepan.

    When Using Cornstarch

    • If you're using Cornstarch, add the cornstarch/sugar mixture to the pan of frozen fruit and lemon juice and stir. Cook on medium heat until the blueberries are fully thawed and the liquid begins to simmer.
    • Cook for about 10-15 minutes as the mixture boils, scraping the pan frequently with a sturdy spatula. The blueberries should be soft enough that they are easy to cut with the spatula. The compote is finished when it is thick and coats your spatula and the berries are soft.

    When using Instant Clearjel

    • If you're using Instant Clearjel, cook just the frozen fruit and lemon juice on medium heat until the berries are fully thawed and the liquid begins to simmer. Cook for about 5 minutes or until the berries are softened and you are happy with their size. The blueberries should be soft enough that they are easy to cut with the spatula.
    • Remove from heat and immediately add the Instant Clearjel/Sugar mixture and stir in quickly until it dissolves. The compote will thicken immediately, and continue to thicken as it cools. *Reminder--make sure you are using INSTANT clearjel. Cooktype and original clearjel do not work the same as Instant and require heat to thicken like the cornstarch method*

    How to Store it

    • Chill the blueberry filling in the refrigerator up to 2 weeks. It may be used from cold as a cake or cupcake filling. Enjoy!

    Notes

    * ½ Tablespoon= 1 ½ teaspoons (in case you don't own a measuring spoon set with a ½ Tablespoon)
    1. Read my article Instant Clearjel: a Magical Little-Known Bakery Ingredient to see why I think this ingredient is worth having in your pantry.  Instant Clearjel must always be whisked thoroughly with other dry ingredients before being added to wet ingredients to avoid clumping.  Cornstarch works just as great in this recipe--the difference is that the Instant Clearjel option will be slightly thicker and glossier, and unused compote made with cornstarch can separate slightly the longer it sits in the fridge--simply stir before using.
    Author: Amy
    Calories: 592kcal

    Calories are estimated using a nutrition calculator. This recipe may link to additional recipes, which contain calories that are not included in this recipe.
    Tried this recipe?Mention @amycakesbakes or comment below! I'd love to hear from you!
    Print Recipe

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    ⭐ For help with a recipe, visit our detailed FAQ page.

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    Comments

    1. Cristy says

      March 24, 2023 at 8:44 am

      5 stars
      Easy and so delicious! My family loved it!

      • Amy says

        March 26, 2023 at 12:13 pm

        I'm so glad you liked the blueberry filling, thank you for your comment! 🙂

        • Cristina says

          April 04, 2023 at 11:05 pm

          5 stars
          Will this recipe fill a 4 layer 8” round cake?

          • Amy says

            April 06, 2023 at 12:02 pm

            Hi Cristina, if you do a 2x batch of the recipe, yes! It will just be a bit less filling per layer than if you were to do a 3-layer cake (which has a generous amount of filling for two layers).

    2. Brooksie says

      July 05, 2022 at 6:26 pm

      5 stars
      This was so delicious and easy to make! We used it between layers of a boxed lemon cake mix and it tasted better anything we've gotten from a bakery! Highly recommend!

      • Amy says

        July 08, 2022 at 9:29 am

        I'm so happy that you enjoyed the blueberry cake filling, I bet it was delicious with lemon cake! Thank you for taking the time to comment! 🙂

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    Hi, I'm Amy!

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    Amycakes was a small family bakery known for its incredibly moist cakes, cupcakes, and delicious bakery treats. Now, we're excited to share all our secrets with you!

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