Lemon mousse with shortbread (Print View)

Zesty lemon mousse over buttery shortbread crumble, perfect for an elegant, easy spring dessert.

# Components:

→ 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

# Directions:

01 - Preheat the 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 together with your fingertips or use a pastry cutter until the mixture resembles coarse breadcrumbs. Spread evenly on the prepared baking sheet.
03 - Bake for 12 to 15 minutes, stirring halfway through, until golden brown. Transfer to a wire rack and cool completely.
04 - In a heatproof medium bowl, whisk together egg yolks, 1/4 cup sugar, lemon juice, and lemon zest. Place the bowl over a pot of simmering water, creating a double boiler setup. Whisk constantly for about 7 minutes until the mixture thickens and reaches 160°F. 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 the remaining 1/4 cup sugar while beating continuously until stiff peaks form.
06 - In a separate clean bowl, whip the chilled heavy cream to soft peaks.
07 - Gently fold the whipped cream into the cooled lemon mixture using a rubber spatula. Then carefully fold in the whipped egg whites until just combined and smooth, being careful not to deflate the mixture.
08 - Spoon a generous layer of cooled shortbread crumble into the bottom of 6 small serving glasses or ramekins. Top each with an equal portion of lemon mousse.
09 - Refrigerate for at least 2 hours before serving. Garnish each cup with fresh berries, lemon zest curls, and mint leaves just before serving.

# Expert Advice:

01 -
  • It tastes like someone hired a professional baker, but you made it in your kitchen on a random Tuesday.
  • The tartness of fresh lemon paired with buttery crumble hits that perfect sweet-and-tangy spot that makes people ask for seconds.
  • Two hours of chilling time means you can prep this in the morning and have an effortless elegant dessert ready when guests arrive.
02 -
  • The egg yolk mixture must reach proper temperature (about 160°F) to safely pasteurize the raw eggs, and you'll feel the difference in texture once it thickens; if it looks thin after 7 minutes, give it another minute or two.
  • Folding is everything here—rushed folding means you'll deflate all that beautiful whipped structure and end up with a dense mousse instead of an airy one, so take your time and use a rubber spatula with broad strokes.
03 -
  • Toast chopped almonds or pistachios in a dry pan for 3 minutes and scatter them into your shortbread crumble for extra crunch and nutty depth that plays beautifully against the bright lemon.
  • If you're hesitant about raw eggs, you can find pasteurized eggs at most grocery stores, or simply use the double boiler method properly and your eggs will be safely heated to 160°F.
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