Diamond Ring Dessert Cake

Featured in: Simple Comfort Bakes

This show-stopping dessert highlights a delicate vanilla sponge paired with rich white chocolate mousse, layered to create a luxurious texture. A glossy mirror glaze with pearl tones adds a jewel-like finish, decorated with edible silver leaf and glitter for an elegant touch. Chill time ensures perfect setting, making it ideal for special occasions. Techniques involve careful sponge baking, mousse preparation, and precise glazing to capture a sparkling centerpiece.

Updated on Sat, 29 Nov 2025 10:11:00 GMT
Diamond Ring Engagement Board: Luxurious dessert with edible glitter and a stunning silver mirror glaze. Pin it
Diamond Ring Engagement Board: Luxurious dessert with edible glitter and a stunning silver mirror glaze. | emberthyme.com

A stunning, show-stopping dessert centerpiece inspired by the elegance of diamond engagement rings. This creative cake features layers of vanilla sponge, rich white chocolate mousse, and a sparkling jewel-like glaze, perfect for celebrations.

This cake is always the highlight of our celebrations, impressing guests with its unique ring shape and delicate flavors.

Ingredients

  • Sponge Cake: 4 large eggs, 120 g granulated sugar, 120 g all-purpose flour, 1/2 tsp vanilla extract, 1/4 tsp salt
  • White Chocolate Mousse: 200 g white chocolate chopped, 300 ml heavy cream divided, 2 sheets gelatin or 5 g powdered gelatin, 1 tsp vanilla extract
  • Mirror Glaze: 200 g white chocolate chopped, 150 g granulated sugar, 100 ml water, 100 g sweetened condensed milk, 8 g powdered gelatin, Food coloring silver pearl or pastel tones
  • Decoration: Edible silver leaf, Edible glitter, Sugar pearls or edible jewels

Instructions

Step 1:
Preheat your oven to 170°C (340°F). Grease and line a large ring-shaped cake pan or a standard cake pan with a small round cutter in the center to create a ring shape.
Step 2:
For the sponge: Whisk eggs and sugar in a stand mixer until pale and tripled in volume (about 8 minutes). Gently fold in sifted flour, vanilla, and salt. Pour into the pan and smooth the surface. Bake for 25 30 minutes or until a toothpick comes out clean. Cool completely.
Step 3:
For the mousse: Soften gelatin in cold water for 5 minutes. Melt white chocolate over a bain-marie or in the microwave. Heat 100 ml cream to just simmering then dissolve the gelatin in it. Pour over melted chocolate stirring until smooth. Cool to room temperature. Whip remaining cream to soft peaks and fold into the chocolate mixture with vanilla.
Step 4:
Slice the cooled cake horizontally into two layers. Place the bottom layer in a clean ring mold or springform pan spread half the mousse add the top layer and cover with remaining mousse. Smooth the top and freeze for 2 hours.
Step 5:
For the glaze: Soften gelatin in cold water. Combine sugar water and condensed milk in a saucepan bring just to a boil then remove from heat. Stir in gelatin to dissolve then pour over white chocolate. Let sit 2 minutes then blend until smooth. Add food coloring for a jewel-like sheen. Cool glaze to 32°C (90°F).
Step 6:
Remove cake from freezer and unmold onto a wire rack. Pour mirror glaze evenly over the frozen cake letting excess drip off. Decorate immediately with edible silver leaf glitter and sugar pearls to mimic a diamond rings sparkle.
Step 7:
Chill the finished cake in the refrigerator for 1 hour to set. Slice and serve.
This Diamond Ring Engagement Board features layers of mousse, perfect for a shimmering celebration centerpiece. Pin it
This Diamond Ring Engagement Board features layers of mousse, perfect for a shimmering celebration centerpiece. | emberthyme.com

This dessert always brings our family together for special occasions, creating unforgettable moments of joy and awe.

Required Tools

Stand mixer or hand mixer, ring cake pan or springform pan, mixing bowls, saucepan, wire rack, offset spatula, thermometer for glaze

Allergen Information

Contains eggs dairy and gluten (wheat). May contain soy in some chocolate. Check all decorations for nut and gluten traces if allergies are a concern.

Nutritional Information

Calories 410 Total Fat 23 g Carbohydrates 47 g Protein 6 g per serving

A close-up shot of the Diamond Ring Engagement Board showcases the edible jewels and elegant ring shape. Pin it
A close-up shot of the Diamond Ring Engagement Board showcases the edible jewels and elegant ring shape. | emberthyme.com

Serve this dazzling cake fresh and chilled to best enjoy its layers and shine.

Recipe FAQs

How do I create the ring shape for the cake?

Use a ring-shaped cake pan or a standard pan with a small round cutter in the center to form the ring shape before baking the sponge.

What is the best way to achieve a smooth white chocolate mousse?

Gently fold whipped cream into the cooled white chocolate gelatin mixture to maintain lightness and smooth texture without deflating.

How is the mirror glaze prepared to get a jewel-like finish?

The glaze combines white chocolate, sugar, condensed milk, and gelatin, melted and cooled to 32°C before adding pearl or pastel food coloring for a sparkling effect.

Can I add fruit flavors to this dessert?

Yes, a layer of raspberry or passion fruit jam between sponge and mousse adds a classic fruity twist without overpowering the glaze.

What cooling times are necessary for this dessert?

Chill the mousse layers for at least 2 hours before glazing, and after glazing, refrigerate for 1 hour to ensure proper setting.

Are there any allergen considerations?

This dessert contains eggs, dairy, and gluten. Check decorations carefully if allergies to soy, nuts, or gluten are a concern.

Diamond Ring Dessert Cake

Layered vanilla sponge and white chocolate mousse topped with a sparkling glaze and edible jewels.

Time to Prep
40 mins
Time to Cook
30 mins
Overall Time
70 mins
By Ember Thyme Clara Henshaw


Skill Level Hard

Cuisine Modern European

Portions 10 Portion Size

Dietary Details Vegetarian-Friendly

What You’ll Need

Sponge Cake

01 4 large eggs
02 1/2 cup granulated sugar
03 1 cup all-purpose flour
04 1/2 teaspoon vanilla extract
05 1/4 teaspoon salt

White Chocolate Mousse

01 7 oz white chocolate, chopped
02 1 1/4 cups heavy cream, divided
03 2 sheets gelatin or 1 teaspoon powdered gelatin
04 1 teaspoon vanilla extract

Mirror Glaze

01 7 oz white chocolate, chopped
02 3/4 cup granulated sugar
03 6 tablespoons water
04 3.5 oz sweetened condensed milk
05 2 1/2 teaspoons powdered gelatin
06 Food coloring (silver, pearl, or pastel tones)

Decoration

01 Edible silver leaf
02 Edible glitter
03 Sugar pearls or edible jewels

How To Make

Step 01

Prepare Oven and Pan: Preheat oven to 340°F. Grease and line a large ring-shaped cake pan or use a standard cake pan with a small round cutter in the center to achieve a ring shape.

Step 02

Make the Sponge: Whisk eggs and sugar in a stand mixer until pale and tripled in volume (around 8 minutes). Gently fold in sifted flour, vanilla extract, and salt. Pour batter into the prepared pan and smooth the surface. Bake 25 to 30 minutes until a toothpick inserted comes out clean. Allow to cool fully.

Step 03

Prepare White Chocolate Mousse: Soften gelatin in cold water for 5 minutes. Melt white chocolate over a double boiler or microwave. Heat 1/2 cup heavy cream to just simmering and dissolve the gelatin within. Pour warm cream mixture over melted chocolate and stir until smooth. Cool to room temperature. Whip remaining 3/4 cup cream to soft peaks, fold gently into chocolate mixture along with vanilla extract.

Step 04

Assemble Layers: Slice cooled cake horizontally into two even layers. Place bottom layer in a clean ring mold or springform pan. Spread half of the mousse evenly over the cake base, add the top layer, and cover with remaining mousse. Smooth the surface and freeze for 2 hours.

Step 05

Create Mirror Glaze: Soften gelatin in cold water. In a saucepan, combine sugar, water, and sweetened condensed milk; bring just to a boil then remove from heat. Stir in gelatin to dissolve fully. Pour mixture over chopped white chocolate and let sit 2 minutes before blending until smooth. Add food coloring for desired shimmer. Cool glaze to approximately 90°F.

Step 06

Glaze and Decorate: Unmold frozen cake onto a wire rack. Pour mirror glaze evenly over the surface, allowing excess to drip off. Immediately decorate with edible silver leaf, glitter, and sugar pearls to emulate diamond sparkle.

Step 07

Chill and Serve: Refrigerate the glazed cake for 1 hour to set fully. Slice and serve chilled.

Equipment Needed

  • Stand mixer or hand mixer
  • Ring-shaped cake pan or springform pan
  • Mixing bowls
  • Saucepan
  • Wire rack
  • Offset spatula
  • Thermometer for glaze temperature

Allergy Info

Review every ingredient for allergens and talk to your healthcare provider if you’re unsure.
  • Contains eggs, dairy, and gluten (wheat).
  • May include soy in some white chocolate brands.
  • Verify decorations for potential nut and gluten contamination.

Nutrition Details (for each portion)

This nutritional info is just for reference—always consult your healthcare provider for specific advice.
  • Calorie Count: 410
  • Fats: 23 g
  • Carbohydrates: 47 g
  • Proteins: 6 g