Lemon Mousse Shortbread Crumble (Printable View)

Zesty lemon mousse layered over buttery shortbread crumble for a refreshing, elegant spring dessert.

# What You'll Need:

→ Shortbread Crumble

01 - 1 cup all-purpose flour
02 - 1/4 cup granulated sugar
03 - 1/2 cup unsalted butter, cold and cubed
04 - Pinch of salt

→ Lemon Mousse

05 - 3 large eggs, separated
06 - 1/2 cup granulated sugar
07 - 1/3 cup freshly squeezed lemon juice
08 - 2 teaspoons finely grated lemon zest
09 - 1/2 cup heavy cream, chilled
10 - 1/4 teaspoon cream of tartar

→ Garnish

11 - Fresh berries
12 - Lemon zest curls
13 - Fresh mint leaves

# How to Make It:

01 - Preheat oven to 350°F. Line a baking sheet with parchment paper.
02 - In a bowl, combine flour, sugar, salt, and cold cubed butter. Rub mixture together with fingertips or use a pastry cutter until texture resembles coarse crumbs. Spread evenly on prepared baking sheet.
03 - Bake for 12 to 15 minutes, stirring mixture halfway through, until golden brown. Remove from oven and cool completely.
04 - In a medium heatproof bowl, whisk together egg yolks, 1/4 cup sugar, lemon juice, and lemon zest. Place bowl over a pot of simmering water and whisk constantly for approximately 7 minutes until thickened. Remove from heat and allow to cool to room temperature.
05 - In a clean bowl, beat egg whites with cream of tartar until soft peaks form. Gradually add remaining 1/4 cup sugar and continue beating until stiff peaks form.
06 - In a separate bowl, whip chilled heavy cream to soft peaks.
07 - Gently fold whipped cream into cooled lemon mixture. Fold in beaten egg whites until just combined and smooth texture is achieved.
08 - Spoon generous layer of shortbread crumble into bottom of 6 small serving glasses or ramekins. Top with lemon mousse. Chill for at least 2 hours before serving.
09 - Top each cup with fresh berries, lemon zest curls, and mint leaves if desired.

# Expert Tips:

01 -
  • The texture contrast between crispy shortbread and silky mousse is genuinely addictive, and it comes together in less time than you'd expect.
  • It feels fancy enough for guests but honest enough for a quiet evening, no pretension required.
02 -
  • Egg whites need a completely clean bowl—any trace of yolk or grease will prevent them from whipping, so wash it twice if you're uncertain.
  • The double boiler is non-negotiable for pasteurizing eggs safely while creating a silky, custard-like base.
03 -
  • Invest in a microplane zester for lemon zest—it creates fine, delicate curls that distribute flavor evenly and look beautiful.
  • If your kitchen is warm, chill your mixing bowls before whipping cream and egg whites so they stay cool and whip faster.
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