Lemon Blueberry Shortbread Mousse Cake
This Lemon Blueberry Shortbread Mousse Cake is a showstopper dessert that will impress your guests at any occasion. With its light and refreshing lemon mousse, luscious blueberry compote, and buttery shortbread crust, this cake brings together delightful flavors in every bite. Perfect for summer gatherings, holiday celebrations, or just a special treat for yourself, this cake is sure to become a favorite!

Why You’ll Love This Recipe
- Perfect balance of flavors: The zesty lemon and sweet blueberries create a harmonious combination that is refreshing and satisfying.
- Easy to make: With straightforward steps and simple ingredients, you can whip up this dessert without stress.
- Impressive presentation: This cake not only tastes great but also looks stunning, making it ideal for special occasions.
- Versatile dessert: Serve it at parties, picnics, or family dinners—it’s suitable for any gathering!
- Make-ahead option: You can prepare this cake a day in advance, allowing the mousse to set properly.
Tools and Preparation
To make the Lemon Blueberry Shortbread Mousse Cake, you’ll need some essential tools to ensure everything goes smoothly.
Essential Tools and Equipment
- Food processor
- Mixing bowls
- Whisk or electric mixer
- Measuring cups and spoons
- 9-inch springform pan
- Saucepan
Importance of Each Tool
- Food processor: Quickly combines ingredients for the shortbread crust, saving time and effort.
- Electric mixer: Ensures the cream cheese and whipped cream achieve the right consistency for a smooth mousse.
- Springform pan: Allows for easy removal of the cake without damaging its delicate structure.
Ingredients
For the Shortbread Crust:
- 1 1/2 cups all-purpose flour
- 1/2 cup powdered sugar
- 1/2 cup unsalted butter, cold and cubed
- Pinch of salt
For the Lemon Mousse:
- 1 cup heavy cream
- 1/2 cup granulated sugar
- Zest of 2 lemons
- 1/2 cup fresh lemon juice
- 1 tablespoon gelatin powder
- 2 tablespoons water
For the Blueberry Compote:
- 8 ounces cream cheese, softened
- 2 cups fresh blueberries
- 1/4 cup granulated sugar
- 1 tablespoon fresh lemon juice
How to Make Lemon Blueberry Shortbread Mousse Cake
Step 1: Prepare the Shortbread Crust
- Combine the all-purpose flour, powdered sugar, unsalted butter, and a pinch of salt in a food processor.
- Pulse until the mixture resembles coarse crumbs.
- Press this mixture evenly into the bottom of the prepared pan.
- Bake for 15-18 minutes or until lightly golden. Allow it to cool completely.
Step 2: Prepare the Lemon Mousse
- Heat the fresh lemon juice over low heat in a saucepan until warm.
- Stir in the bloomed gelatin powder, mixing until dissolved. Let this mixture cool to room temperature.
- In a mixing bowl, beat together the heavy cream, granulated sugar, and lemon zest. Continue beating until stiff peaks form.
Step 3: Combine Ingredients for Mousse
- In another bowl, whip the softened cream cheese until smooth.
- Gradually add the cooled lemon juice mixture while continuing to beat until fully combined.
- Gently fold in the whipped cream until no streaks remain.
Step 4: Assemble and Chill
- Pour the lemon mousse over the cooled shortbread crust in your springform pan.
- Refrigerate for at least 4 hours or until set.
Step 5: Add Blueberry Compote
- In a small saucepan over medium heat, combine fresh blueberries with granulated sugar and lemon juice. Cook until berries soften and release juices.
- Allow it to cool slightly before pouring it over the set mousse layer.
Step 6: Serve
- Before serving, run a knife around the edge of the pan to loosen it gently.
- Carefully remove the sides of your springform pan, slice your cake, and serve chilled.
Enjoy every delightful bite of this refreshing dessert!
How to Serve Lemon Blueberry Shortbread Mousse Cake
Serving your Lemon Blueberry Shortbread Mousse Cake can elevate the dessert experience, making it even more delightful. Here are some creative serving suggestions to enhance the flavors and presentation of this delicious cake.
Pair with Fresh Berries
- Fresh blueberries and raspberries add a burst of flavor and color, complementing the cake beautifully.
Drizzle with Lemon Glaze
- A simple lemon glaze made from powdered sugar and lemon juice can add an extra sweet-tart element to each slice.
Top with Whipped Cream
- Light and airy whipped cream enhances the mousse texture and adds a creamy layer that balances the cake’s richness.
Serve with a Scoop of Ice Cream
- Vanilla or lemon sorbet can provide a refreshing contrast to the creamy mousse, making each bite even more enjoyable.
Garnish with Mint Leaves
- Fresh mint leaves not only add a pop of color but also bring a refreshing aroma that pairs well with lemon and blueberry.
Create a Layered Parfait
- For a fun twist, layer pieces of the mousse cake with additional blueberries and whipped cream in individual cups for a parfait-style dessert.

How to Perfect Lemon Blueberry Shortbread Mousse Cake
Perfecting your Lemon Blueberry Shortbread Mousse Cake ensures every bite is as delightful as possible. Here are some tips to achieve that perfect result.
-
Use cold ingredients: Ensure your butter and cream cheese are cold for a firmer texture in the crust and mousse.
-
Beat until stiff peaks form: When whipping the heavy cream, ensure you reach stiff peaks for a light and airy mousse.
-
Don’t skip chilling time: Refrigerate the cake for at least 4 hours to allow it to set properly; this improves both flavor and texture.
-
Fresh lemons matter: Use fresh lemon juice and zest for vibrant flavor; bottled juice may lack the same brightness.
-
Carefully remove from pan: Run a knife around the edges before releasing the springform pan to avoid breaking your mousse cake.
-
Experiment with toppings: Try different toppings like citrus zest or edible flowers for added flair when serving.
Best Side Dishes for Lemon Blueberry Shortbread Mousse Cake
Complementing your Lemon Blueberry Shortbread Mousse Cake with side dishes can create a balanced dessert experience. Here are some tasty options:
-
Lemon Sorbet: A light, tangy sorbet offers a refreshing finish after enjoying the rich cake.
-
Berry Salad: A mixed berry salad with mint creates a fresh contrast that enhances the flavors of the mousse cake.
-
Pistachio Crumble: The nutty crunch of pistachios adds texture and pairs well with blueberries and lemon.
-
Coconut Macaroons: These chewy treats provide sweetness that complements the tartness of the cake perfectly.
-
Chilled Fruit Soup: A light fruit soup made from strawberries or peaches provides a refreshing accompaniment.
-
Homemade Granola: Crunchy granola sprinkled on top adds texture while keeping things light, perfect for enhancing each bite.
Common Mistakes to Avoid
Making a Lemon Blueberry Shortbread Mousse Cake can be a fun experience, but there are common pitfalls to watch out for.
- Not chilling the mousse properly: If you skip the refrigeration step, the mousse won’t set correctly, resulting in a runny filling. Always refrigerate for at least 4 hours.
- Overmixing the cream: Overwhipping the heavy cream can lead to a grainy texture. Beat until stiff peaks form, but stop before it turns into butter.
- Neglecting to use fresh ingredients: Using old or stale ingredients can affect both flavor and texture. Always use fresh lemons and blueberries for the best results.
- Skipping the gelatin: Gelatin is crucial for stabilizing the mousse. Don’t omit this ingredient; it ensures your cake holds its shape.
- Not pressing the crust firmly enough: A loose crust may crumble when you slice the cake. Make sure to press it down evenly and firmly into the pan.

Storage & Reheating Instructions
Refrigerator Storage
- Store leftovers in an airtight container for up to 3 days.
- Place parchment paper between layers if stacking to avoid sticking.
Freezing Lemon Blueberry Shortbread Mousse Cake
- Wrap individual slices tightly in plastic wrap and then in aluminum foil for up to 2 months.
- Thaw overnight in the refrigerator before serving.
Reheating Lemon Blueberry Shortbread Mousse Cake
- Oven: Preheat to 350°F (175°C). Place slices on a baking sheet and warm for about 10 minutes.
- Microwave: Heat on medium power for 20-30 seconds, checking frequently to avoid melting.
- Stovetop: Use a non-stick skillet on low heat, covering with a lid for even warming.
Frequently Asked Questions
Here are some common questions about making a Lemon Blueberry Shortbread Mousse Cake.
Can I make Lemon Blueberry Shortbread Mousse Cake ahead of time?
Yes, you can prepare this cake one day in advance. Just ensure it’s well covered while chilling.
What can I substitute for gelatin in this recipe?
You can use agar-agar as a vegetarian alternative. The setting instructions will vary slightly, so follow package guidelines.
How do I know when my mousse is ready?
The mousse should be thick enough to hold its shape yet smooth without lumps. It should also hold stiff peaks after whipping.
Can I use frozen blueberries instead of fresh ones?
Yes, but fresh blueberries are recommended for better flavor and texture. If using frozen, allow them to thaw completely first.
Final Thoughts
This Lemon Blueberry Shortbread Mousse Cake is an elegant dessert that combines zesty lemon and sweet blueberries beautifully. It’s perfect for any occasion or just as a treat for yourself! Feel free to customize it by adding different berries or adjusting the sweetness according to your taste.

Lemon Blueberry Shortbread Mousse Cake
- Total Time: 48 minutes
- Yield: 10 servings
Description
Lemon Blueberry Shortbread Mousse Cake is a delightful dessert that combines the zesty brightness of lemon with the sweet flavor of blueberries, all resting on a buttery shortbread crust. Perfect for summer gatherings or special occasions, this cake features a light and airy mousse complemented by a luscious blueberry compote. Easy to prepare and impressive in presentation, it’s sure to become a favorite among friends and family. Whether you’re celebrating a holiday or just indulging yourself, this cake brings joy in every bite.
Ingredients
- Shortbread Crust: all-purpose flour, powdered sugar, unsalted butter, salt
- Lemon Mousse: heavy cream, granulated sugar, lemon zest, fresh lemon juice, gelatin powder
- Blueberry Compote: cream cheese, fresh blueberries, granulated sugar
Instructions
- Preheat oven to 350°F (175°C). In a food processor, combine flour, powdered sugar, butter, and salt until crumbly. Press into a springform pan and bake for 15-18 minutes until golden. Cool completely.
- For the lemon mousse, warm lemon juice; dissolve gelatin in it. Beat heavy cream with sugar and zest until stiff peaks form. Mix in cream cheese and cooled gelatin mixture; fold in whipped cream.
- Pour mousse over crust; refrigerate for at least 4 hours to set.
- For blueberry compote, cook blueberries with sugar and lemon juice until soft. Cool slightly before pouring over set mousse layer.
- Chill again if necessary before serving.
- Prep Time: 30 minutes
- Cook Time: 18 minutes
- Category: Dessert
- Method: Baking
- Cuisine: American
Nutrition
- Serving Size: 1 serving
- Calories: 320
- Sugar: 24g
- Sodium: 150mg
- Fat: 22g
- Saturated Fat: 12g
- Unsaturated Fat: 8g
- Trans Fat: 0g
- Carbohydrates: 28g
- Fiber: 1g
- Protein: 3g
- Cholesterol: 55mg