Lemon Blueberry Shortbread Mousse Cake (Printable)

Layered dessert with buttery crust, tangy lemon mousse, and swirled blueberry compote for a refreshing summer treat.

# Components:

→ Shortbread Crust

01 - 1 1/2 cups all-purpose flour
02 - 1/2 cup powdered sugar
03 - 1/2 cup unsalted butter, cold and cubed
04 - Pinch of salt

→ Lemon Mousse

05 - 1 cup heavy cream
06 - 1/2 cup granulated sugar
07 - Zest of 2 lemons
08 - 1/2 cup fresh lemon juice
09 - 1 tablespoon gelatin powder
10 - 2 tablespoons water
11 - 8 ounces cream cheese, softened

→ Blueberry Compote

12 - 2 cups fresh blueberries
13 - 1/4 cup granulated sugar
14 - 1 tablespoon fresh lemon juice

# Method:

01 - Preheat oven to 350°F. Line an 8-inch springform pan with parchment paper.
02 - In a food processor, combine flour, powdered sugar, butter, and salt. Pulse until mixture resembles coarse crumbs. Press firmly into the bottom of the prepared pan.
03 - Bake crust for 20-25 minutes, or until golden and set. Allow to cool completely.
04 - In a saucepan over medium heat, combine blueberries, 1/4 cup sugar, and 1 tablespoon lemon juice. Cook, stirring occasionally, until berries burst and mixture thickens, about 8-10 minutes. Let cool completely.
05 - In a small bowl, sprinkle gelatin over 2 tablespoons water; let bloom for 5 minutes.
06 - In a small saucepan, combine lemon juice and gelatin mixture. Heat gently, stirring, until gelatin dissolves. Cool to room temperature.
07 - In a large bowl, beat cream cheese with 1/2 cup granulated sugar and lemon zest until smooth and creamy.
08 - In a separate bowl, whip heavy cream until stiff peaks form.
09 - Gradually beat the cooled gelatin-lemon mixture into the cream cheese mixture until smooth. Gently fold in the whipped cream until fully incorporated.
10 - Spread half the lemon mousse over the cooled crust. Spoon half the blueberry compote over the mousse and gently swirl. Top with remaining mousse and swirl the rest of the compote on top.
11 - Refrigerate for at least 4 hours, or until set.
12 - Serve chilled, garnished with additional fresh berries or whipped cream if desired.

# Expert Advice:

01 -
  • The texture contrast alone will have you coming back for seconds—crisp buttery crust, silky smooth mousse, and jewel-like bursts of blueberry
  • It looks like you spent all day in a professional kitchen, but most of the work happens while the refrigerator does the heavy lifting
  • The bright lemon cuts through the rich creaminess, making each slice feel surprisingly light despite being so indulgent
02 -
  • The crust must be completely cooled before adding the mousse, or the heat will melt the gelatin and ruin the texture
  • Room temperature cream cheese is essential—cold cream cheese will leave you with lumps that no amount of mixing can fix
  • The gelatin mixture cannot be hot when added to the cream cheese, or it will seize and create tiny rubbery bits throughout your mousse
  • Resist the urge to rush the chilling time—this cake needs a full 4 hours to set properly for clean slices
03 -
  • Run your knife under hot water and wipe it dry between each slice for picture-perfect servings
  • If your mousse mixture starts feeling too soft at any point, pop the bowl in the refrigerator for 10 minutes before continuing
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