Lemon Mousse Shortbread Crumble (Printable Version)

Zesty lemon mousse atop buttery shortbread crumble, offering a light and refreshing dessert experience.

# What You 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, approximately 2 lemons
08 - 2 teaspoons finely grated lemon zest
09 - 1/2 cup heavy cream, chilled
10 - 1/4 teaspoon cream of tartar, optional for stability

→ Garnish

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

# How-To Steps:

01 - Preheat oven to 350°F. Line a baking sheet with parchment paper.
02 - In a mixing bowl, combine flour, sugar, salt, and cold cubed butter. Rub mixture together with fingertips or use a pastry cutter until it resembles coarse crumbs.
03 - Spread mixture evenly on prepared baking sheet. Bake for 12 to 15 minutes, stirring halfway through, until golden brown. Remove from oven and cool completely.
04 - In a heatproof medium bowl, whisk together egg yolks, 1/4 cup sugar, lemon juice, and lemon zest. Place bowl over a pot of simmering water, whisking constantly for approximately 7 minutes until mixture thickens. Remove from heat and cool to room temperature.
05 - In a clean bowl, beat egg whites with cream of tartar if using 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. Then fold in beaten egg whites until just combined and smooth.
08 - Spoon generous layer of shortbread crumble into bottom of 6 small serving glasses or ramekins. Top with lemon mousse. Refrigerate for at least 2 hours before serving.
09 - Top each cup with fresh berries, lemon zest curls, and mint leaves as desired.

# Expert Advice:

01 -
  • Combines a zesty lemon mousse with a rich, buttery shortbread crumble for a delightful texture contrast.
  • Easy to prepare and make ahead, perfect for entertaining or a light dessert any day.
  • Vegetarian-friendly and adaptable with gluten-free flour if needed.
02 -
  • Use a double boiler to gently cook the egg yolk mixture for better texture and safety.
  • Whip egg whites and cream separately to achieve maximum volume and lightness.
  • Cool the lemon base completely before folding in whipped ingredients to prevent deflating the mousse.
  • Prepare the crumble ahead and store it airtight to save time on serving day.
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