Lemon Blueberry Shortbread Mousse Cake (Print Version)

A refreshing layered dessert with buttery crust, tangy lemon mousse, and sweet blueberry compote.

# 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

# Directions:

01 - Preheat oven to 350°F. Line an 8-inch springform pan with parchment paper.
02 - In a food processor, combine flour, powdered sugar, cold cubed butter, and salt. Pulse until mixture resembles coarse crumbs.
03 - Press flour mixture firmly into the bottom of the prepared pan. Bake for 20 to 25 minutes until golden and set. Allow to cool completely.
04 - In a saucepan over medium heat, combine blueberries, sugar, and lemon juice. Cook, stirring occasionally, until berries burst and mixture thickens, approximately 8 to 10 minutes. Let cool completely.
05 - In a small bowl, sprinkle gelatin powder over water and let bloom for 5 minutes.
06 - In a small saucepan, combine lemon juice and bloomed gelatin mixture. Heat gently, stirring constantly, until gelatin dissolves completely. Cool to room temperature.
07 - In a large bowl, beat softened cream cheese with 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 to combine. Top with remaining mousse and swirl remaining compote on top.
11 - Refrigerate for at least 4 hours until fully set.
12 - Remove from refrigerator and serve chilled. Garnish with additional fresh berries or whipped cream if desired.

# Expert Advice:

01 -
  • The textural contrast between crispy shortbread, silky mousse, and bursting berries makes every bite feel special.
  • It actually gets better after a few hours in the fridge, so you can prep it the morning of and relax before guests arrive.
  • That bright lemon flavor keeps it refreshing even on the richest of days.
02 -
  • Don't skip the blooming step for gelatin—I learned this the hard way when I dumped it straight into hot liquid and ended up with a textured mousse that felt slightly grainy, and no amount of straining fixed it.
  • If your mousse seems too thick when you're folding in the cream, it means your gelatin mixture cooled too much; let it sit at room temperature for a minute or two to loosen it slightly before continuing.
03 -
  • Use a hot, wet knife when slicing each piece—wipe it clean between cuts and you'll get clean, beautiful slices instead of dragging the mousse around.
  • If your kitchen is warm, chill the springform pan before assembling so the mousse sets faster and holds its shape while you're working.
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