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Chocolate Raspberry Mousse Layer Cake

Bake four chocolate cake layers with chocolate mousse and fresh raspberries, finished with buttercream. Includes pan sizes and a printable recipe.

4 hr 30 min including cooling / setting12 servings
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Chocolate Raspberry Mousse Layer Cake
AI-generated food illustration. Actual prepared dishes may differ.

About this recipe

A layered celebration dessert with a source-based formulation and an English preparation guide. Ingredient ratios and pan sizes were checked against the credited recipe; Best Quick Recipe has not independently baked this version. The image is an AI-generated illustration, not a photograph of a tested batch.

A mousse-filled layer cake, not a frozen fruit-insert cake

Four baked cocoa layers alternate with chocolate cream-cheese mousse and fresh raspberries. The outside is buttercream, so this cake does not need a mirror glaze or frozen fruit disc. It suits someone comfortable baking a sponge but not ready for pectin or gelatin work. Its height means the serving plate and refrigerator shelf need extra clearance. Plan the cooling time before starting: a warm sponge cannot be safely rescued by adding more frosting.

Keep the different chocolate ingredients separate

Cocoa powder goes into both the cake and the frosting, but the filling uses melted semisweet chocolate. Label the bowls rather than estimating from memory. A coating product sold only for dipping may not behave like a chocolate bar. Chop a bar into small pieces before gently melting it. Keep water away from melted chocolate, and avoid adding hot chocolate directly to chilled cream. The filling instructions specify barely warm chocolate for that reason.

Before you start: weigh and organise

Read the whole card before opening the ingredients. Set out one bowl for each component and label similar-looking quantities, especially sugar and cream. Weigh in grams where a weight is given; use level measuring spoons for small amounts. A tablespoon means 15 ml and a teaspoon 5 ml. Prepare the specified pans before mixing. Check that your cooling rack, cake board and refrigerator shelf have enough room for the finished cake. Keep eggs and dairy out only as long as needed for preparation.

A photograph is a guide, not a doneness test

The illustration shows the intended style, but it cannot tell you whether your actual cake is cooked or its filling has set. Use the checks in the instructions. Oven settings, pan material and the size of your eggs can change a baking time. Check near the beginning of the stated range and avoid opening the oven repeatedly. A skewer should test sponge, not a pocket of fruit or melted chocolate. Never taste uncooked batter containing raw flour or eggs.

Ingredient requirements and allergens

There is no gelatin, pork or alcoholic drink in this formulation. Where vanilla or coconut flavouring is listed, use a product explicitly labelled alcohol-free rather than ordinary alcohol-based extract. Check packaged chocolate, wafers, cream cheese and flavourings for ingredients suitable for your needs. The recipe is not a halal certification. It contains eggs, milk and wheat unless otherwise indicated; read every label for additional allergens and cross-contact information.

Portioning and serving

Place the cake on a firm, level serving surface. Use a long sharp knife and wipe the blade between cuts; warm water helps clean it, but dry the blade before the next slice. Serve small portions of a rich celebration cake and return the rest to the refrigerator promptly. Keep refrigerated at 4°C / 40°F or below. For home preparation, this guide uses a conservative two-day refrigerated storage recommendation. Use a covered cake box so the filling is protected from strong refrigerator odours.

Carrying a tall cake

Use a board wider than the cake and carry it from underneath, not by gripping the frosting or the rim of a flimsy plate. Refrigerate it before a short journey and use a suitable insulated container when needed. A tall cake should travel flat, away from direct sunlight. For an outdoor event without reliable refrigeration, choose a different dessert rather than trying to stabilise this mousse by adding unmeasured gelatin.

Recipe at a glance

Chocolate Raspberry Mousse Layer Cake takes about 4 hr 30 min: 60 minutes of preparation and 50 minutes of cooking, plus approximately 2 hr 40 min for cooling, setting or thawing. The recipe makes 12 servings. Follow the ingredient quantities and cooking steps in the printable card below.

BEST QUICK RECIPE · RECIPE CARD

Chocolate Raspberry Mousse Layer Cake

Bake four chocolate cake layers with chocolate mousse and fresh raspberries, finished with buttercream. Includes pan sizes and a printable recipe.

Prep60 min
Cook50 min
Cooling / setting2 hr 40 min
Total4 hr 30 min
Servings12
Recipe source: King Arthur Baking — Chocolate Mousse Cake with Raspberries

Uses the source’s two deep 8-inch pan option. The frosting uses its explicitly permitted all-butter alternative. Optional chips and ClearJel are omitted; vanilla is explicitly alcohol-free. This version has not been independently kitchen-tested by Best Quick Recipe.

Ingredients

25 items

Check off ingredients as you prepare them.

Instructions

10 steps
  1. Heat the oven to 325°F / 163°C conventional. Grease and line two 8-inch / 20 cm round pans at least 2 inches / 5 cm deep; 3-inch-deep pans give more headroom. The cakes will later be split to make four layers. Do not put this amount of batter into two shallow sandwich tins.

  2. Whisk flour, baking soda, baking powder, salt, sugar and cocoa together, breaking up lumps. Mix the oil, buttermilk, boiling water and alcohol-free vanilla separately. Beat the liquid into the dry mixture for 30–60 seconds until smooth.

  3. Scrape the bowl. Beat in the eggs one at a time, then mix for another minute. Divide the batter evenly between the two pans. Bake 45–50 minutes, checking for a set centre and a skewer with a few moist crumbs rather than wet batter.

  4. Cool in the pans for 15 minutes, release the edges and turn onto racks. Let both cakes cool completely before cutting or filling.

  5. For the filling, beat 28 g butter, cream cheese, 85 g icing sugar, 1/2 tsp alcohol-free vanilla and 1/8 tsp salt until smooth. Mix in the melted, barely warm semisweet chocolate and beat for about one minute until lighter.

  6. Whip the cold cream to soft peaks, add the remaining 28 g icing sugar, then continue just until firm peaks form. Stop before it becomes grainy. Fold gently into the chocolate cream-cheese mixture. Keep the filling chilled while arranging the cooled cakes.

  7. Split each cake horizontally to make four even layers. Set the first on a sturdy plate, spread with one-third of the mousse and arrange a layer of lengthwise-halved raspberries over it. Repeat for the next two filling layers. Add the final cake, flat side uppermost, and refrigerate at least 30 minutes.

  8. For the frosting, beat the 226 g butter and 1/4 tsp salt until smooth. Add sifted icing sugar and cocoa in stages, alternating with the 57 g milk. Add 1 tsp alcohol-free vanilla and beat about two minutes until fluffy.

  9. Spread a thin crumb coat over the chilled cake. Refrigerate for 20 minutes, then apply the rest of the frosting. Use any remaining raspberries as decoration shortly before serving.

  10. Keep refrigerated until serving and use within two days under this site’s conservative storage guidance. The estimated total includes cooling and chilling, but a warm kitchen can require additional refrigerator time.

Cooking note: Cooking times are estimates. Follow safe food-handling practices, check doneness with a food thermometer when appropriate, and always review ingredients for allergens.

Helpful cooking tips

Frequently asked questions

Does the mousse contain raw eggs?

No. The eggs are baked in the sponge; the filling uses cream cheese, chocolate and whipped cream.

Why are there four layers but only two pans?

Each completely cooled deep cake is cut horizontally in half.

Can I use two shallow cake tins?

No. The listed batter quantity requires deep pans, or a separately planned alternative with more pans.

Is there a raspberry jelly layer?

No. This formulation uses fresh raspberries between the mousse-filled layers.

Can I use alcohol-based vanilla extract?

Use explicitly alcohol-free flavouring to meet the alcohol-free requirement.

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