Ingredients
- 250 g mascarpone cheese
- 150 ml heavy cream
- 80 g powdered sugar
- Zest and juice of 2 lemons
- 1 teaspoon vanilla extract
- 120 g unsalted butter, softened
- 100 g brown sugar
- 80 g granulated sugar
- 1 large egg
- 180 g all-purpose flour
- 1/2 teaspoon baking soda
- 1/4 teaspoon salt
- 100 g salted pistachios, chopped
Directions
Cream butter and sugars.
Beat in egg and vanilla.
Mix flour, baking soda, and salt; fold into the batter.
Stir in pistachios.
Chill dough for 30 minutes.
Scoop dough into rounds and bake at 180°C for 10–12 minutes until edges are golden.
Whip cream until soft peaks form.
In a separate bowl, beat mascarpone, sugar, lemon zest, juice, and vanilla until smooth.
Gently fold the whipped cream into the mascarpone mixture.
Spoon the mousse into silicone molds or cookie-sized rings.
Freeze for at least 4 hours or overnight.
Place a frozen mousse disc between two warm cookies and serve immediately.
Frequently Asked Questions
How should I store the Lemon Mousse & Pistachio Cookie Sandwiches to keep the cookies crisp?
Because this dessert features a delicate lemon mousse filling, it must be stored in an airtight container in the refrigerator for up to 3 days. To minimize the cookies getting soft, assemble the sandwiches right before serving, or keep the baked pistachio cookies separate at room temperature for up to a week.
Can I make the lemon mousse filling ahead of time for this Upside-Down sandwich recipe?
Yes, you can prepare the lemon mousse, which uses mascarpone cheese, heavy cream, and lemon zest/juice, up to 24 hours in advance. Store the mousse covered in the refrigerator; just ensure it is well-chilled before assembling the sandwiches to maintain its structure.
What can I substitute for mascarpone cheese in the lemon mousse filling?
If mascarpone is unavailable, you can substitute it with an equal amount of full-fat cream cheese, ensuring it is softened before mixing. This substitution will yield a slightly tangier mousse, but it will still pair beautifully with the pistachio cookies.
