
This light and airy lemon mousse cake perfectly balances bright citrus flavors with delicate cream. Built on a crisp cookie base, the silky mousse layer is topped with a glossy finish that makes this dessert as beautiful as it is delicious.
The bright lemon flavor and smooth texture make this cake an absolute showstopper for special occasions.
Key Ingredients
- Graham Crackers: Fresh for optimal crunch
- Butter: Unsalted and slightly melted
- Heavy Cream: At least 35% fat content
- Cream Cheese: Room temperature for smooth mixing
- Lemons: Organic preferred for zest
- Gelatin: Sheet or powder form both work
- Powdered Sugar: Sifted to prevent lumps
- Vanilla: Pure extract recommended
Step-by-Step Instructions
- 1. Cookie Base Preparation
- - Crush crackers into fine crumbs
- Mix with melted butter and sugar
- Press firmly into pan
- Chill while making mousse - 2. Lemon Mousse
- - Whip cold cream until stiff peaks form
- Beat cream cheese until smooth
- Blend in lemon juice and zest
- Fold whipped cream gently
- Incorporate prepared gelatin if using - 3. Assembly
- - Pour mousse over crust
- Smooth top surface
- Tap pan to remove air bubbles
- Refrigerate 4+ hours or overnight - 4. Glaze Topping
- - Combine lemon juice and sugar
- Add cornstarch slurry
- Cook until thickened
- Cool before topping cake - 5. Final Touches
- - Unmold using warm knife
- Pour glaze from center outward
- Add optional garnishes
- Keep chilled until serving
For the brightest flavor, Meyer lemons make an excellent choice when in season.

Storage Tips
Store covered in refrigerator for up to 3 days. The glaze helps preserve freshness.
Recipe Variations
- Lime and basil version
- Mixed citrus blend
- Lemon-berry combination
Serving Suggestions
Plate with yellow fruit coulis or seasonal fresh fruit.
This lemon mousse cake has become a go-to dessert for celebrations. Its refreshing taste and cloud-like texture provide the perfect finale to any meal, regardless of season. The harmonious blend of flavors and ethereal texture creates a memorable dessert that brings a touch of sunshine to every table.
Frequently Asked Questions
- → Can I make this cake ahead of time?
- Definitely! It stays fresh for 2-3 days in the fridge, making it great to prepare a day in advance.
- → Is the gelatin absolutely required?
- Not mandatory, but it helps keep the mousse firm, especially in warmer weather.
- → Can this cake be frozen?
- Yes, you can freeze it (without the glaze) for up to a month. Just thaw it in the fridge overnight.
- → What kind of biscuits work best for the crust?
- Graham crackers are a classic choice, but you can swap them with shortbread or spice cookies like speculoos.
- → How do I remove the cake from the pan cleanly?
- Run a warm knife around the edge of the pan before releasing the springform latch.