Chocolate Fudge Buttercream

The recipe, step by step

Rich, smooth and wonderfully creamy, this chocolate fudge buttercream is packed with real dark chocolate and cocoa powder for a deep, fudgy flavour. It is easy to make, beautifully silky and firm enough for spreading, filling and piping.

This is one of my favourite frostings for Chocolate Fudge Cake, Devil’s Food Cake and Double Chocolate Espresso Muffins, although it works beautifully with all sorts of cakes, cupcakes, muffins and traybakes.

The combination of melted dark chocolate and cocoa powder gives this buttercream far more depth than using cocoa alone, while a little double cream makes it wonderfully smooth and easy to work with. Better still, the whole recipe takes around 12 minutes.

Recipe Highlights

• Easy to make: Ready in approximately 12 minutes.
• Rich chocolate flavour: Made with both melted dark chocolate and unsweetened cocoa powder.
• Texture: Smooth, creamy and silky with enough structure for spreading and piping.
• Versatile: Ideal for cakes, cupcakes, muffins and other celebration bakes.
• Make ahead: Prepare it several days in advance and whip it again before using.
• Freezer-friendly: Can be frozen and brought back to a smooth consistency after thawing.
• Quantity: Makes approximately 500 g buttercream.
• Enough for: Approximately 6–8 cupcakes or muffins, or a two-layer 20 cm (8 inch) cake.

Ingredients and Substitutions

• Dark chocolate: Use 100 g dark chocolate with a minimum of 50% cocoa solids, finely chopped. Real chocolate gives this buttercream its rich, fudgy flavour and smooth texture.
• Unsalted butter: Use 150 g, softened to room temperature. It should be soft enough to beat easily but not melted or greasy.
• Fine sea salt: Add a pinch. Salt balances the sweetness and helps bring out the flavour of the chocolate.
• Icing sugar: Use 200 g, sifted. Also known as powdered or confectioners’ sugar, it sweetens the buttercream while giving it the structure needed for spreading and piping.
• Unsweetened cocoa powder: Use 3–4 tablespoons (25–30 g). Cocoa deepens the chocolate flavour without adding additional sweetness.
• Whipping or double cream: Use 2–3 tablespoons (30–45 ml), adding enough to create the consistency you need. Double or whipping cream gives the richest, silkiest result.

Single cream or whole milk can also be used when necessary, although the finished buttercream will be slightly less rich. Add any liquid gradually because even a small amount can noticeably change the consistency.

How to Make Chocolate Fudge Buttercream

1. Melt the chocolate: Place the chopped dark chocolate in a heatproof bowl set over a saucepan of gently simmering water to create a double boiler. Make sure the bottom of the bowl does not touch the water. Stir occasionally until the chocolate is completely melted.

2. Beat the butter: Place the softened butter and salt in a large mixing bowl or stand mixer. Beat for approximately 2 minutes, until smooth and creamy.

3. Finish the buttercream: Add the melted chocolate and beat again. Sift in the icing sugar and cocoa powder, then add the cream. Continue mixing until the buttercream is completely smooth and creamy.

How Much Chocolate Buttercream Do I Need?

This recipe makes approximately 500 g chocolate fudge buttercream.

That is enough for approximately:

• 6–8 cupcakes or muffins with generous swirls
• One two-layer 20 cm (8 inch) cake

The exact amount you need will naturally depend on how thickly you spread or pipe the buttercream.

For larger cakes or more elaborate piping, increase the recipe accordingly.

Nigel’s Recipe Tips

Use properly softened butter. Cold butter will not combine smoothly with the remaining ingredients and can leave little lumps throughout your buttercream. On the other hand, melted butter will make it greasy and too soft.

Melt the chocolate gently. When using a double boiler, keep the heat gentle and make sure the bowl does not touch the simmering water.

Let very hot chocolate cool slightly. The chocolate needs to remain fluid, but adding piping-hot chocolate to the butter can soften it considerably.

Sift the icing sugar and cocoa. Both ingredients are prone to forming small lumps. Sifting them helps create a much smoother finished buttercream.

Add the cream carefully. Start with the lower quantity and add more only when necessary. It is much easier to loosen thick buttercream than to rescue one that has become too soft.

Do not reduce the icing sugar too far. The sugar provides structure as well as sweetness. Reducing it substantially may prevent the buttercream holding its shape when piped.

Remember the salt. The dark chocolate, cocoa and fine sea salt all help balance the sweetness and give the frosting a fuller chocolate flavour.

Beat until completely smooth. Once everything has been added, continue mixing until the buttercream looks silky and creamy.

Remove excess air for smooth cake finishes. After beating, slowly stir the finished buttercream with a spatula, pressing it against the side of the bowl to remove larger air bubbles.

Cool cakes completely. Even a slightly warm cake can soften the butter and cause your frosting to melt or slide.

Consider the room temperature. Buttercream naturally becomes softer in a warm kitchen and firmer in a cool one. Chill it briefly if it becomes too soft, or allow cold buttercream to soften before piping.

Variations

Chocolate Orange Buttercream

Add approximately 1 teaspoon orange extract or finely grated orange zest.

Add extract gradually and taste as you go, because strengths vary considerably between brands.

Chocolate Coconut Buttercream

Add approximately 1 teaspoon coconut extract.

To emphasise the flavour further, decorate the finished cake with toasted coconut.

Chocolate Almond Buttercream

Add approximately ½ teaspoon almond extract. Almond extract is quite powerful, so begin with the stated amount before adding any more.

Chocolate Mint Buttercream

Add a few drops of peppermint extract for a classic chocolate-mint buttercream. Peppermint is particularly strong, so add it sparingly.

Coffee Chocolate Buttercream

Dissolve a small amount of instant espresso powder in the cream before adding it to the buttercream. Coffee complements and intensifies the chocolate flavour beautifully.

Salted Chocolate Buttercream

Add a little additional fine sea salt, or finish the buttercream with a small amount of flaky sea salt for a stronger sweet-and-salty contrast.

Frequently Asked Questions

What Is Chocolate Fudge Buttercream?

Chocolate fudge buttercream is a rich chocolate frosting made with butter, icing sugar, cocoa powder and melted chocolate. Using both real chocolate and cocoa gives it a deeper flavour and more indulgent texture than a buttercream made with cocoa alone.

Can I Pipe This Chocolate Buttercream?

Yes. It is suitable for piping swirls, rosettes and other decorations. The important thing is the consistency: allow refrigerated buttercream to come back towards room temperature, but do not let it become so warm that it loses its shape.

Why Is My Chocolate Buttercream Too Runny?

The butter or chocolate may have been too warm, or too much cream may have been added.

Chill the buttercream briefly, then beat it again. If it still needs additional structure, a little sifted icing sugar can be incorporated.

Why Is My Buttercream Too Stiff?

Cold buttercream becomes naturally firm because of the butter and chocolate. Allow it to soften at room temperature and beat it again. If necessary, add a small amount of cream to loosen the consistency.

Why Is My Chocolate Buttercream Grainy?

Unsifted icing sugar or cocoa, cold butter or poorly melted chocolate can all contribute to a grainy texture. Make sure the ingredients are at suitable temperatures, sift the dry ingredients and beat thoroughly until smooth.

Why Has My Buttercream Split?

A difference in ingredient temperatures or too much liquid can cause buttercream to split. Continue beating it first, as it may come back together. If it is very cold, gently warming the outside of the bowl can help. If it looks overly warm and greasy, chill it briefly before whipping again.

Can I Use Milk Chocolate Instead of Dark Chocolate?

You can, although the result will be sweeter, lighter in flavour and potentially softer because milk chocolate behaves differently from dark chocolate. You may therefore need to adjust the amount of cream or icing sugar to achieve the same consistency.

Can I Use White Chocolate?

White chocolate will produce a very different buttercream because it contains no cocoa solids and is considerably sweeter. The icing sugar and cream quantities may therefore need adjusting.

Which Cocoa Powder Is Best?

Both natural and Dutch-processed unsweetened cocoa powder can be used in buttercream. Natural cocoa generally has a slightly sharper flavour, whereas Dutch-processed cocoa tends to taste smoother and can produce a darker-looking buttercream.

How Far Ahead Can I Frost a Cake?

You can frost a cake a day or two before serving. Keep it appropriately covered and refrigerated, then allow it to come towards room temperature before serving for the best flavour and texture.

Tools You’ll Need

• Electric hand whisk or stand mixer
• Large mixing bowl
• Heatproof bowl
• Small saucepan
• Fine-mesh sieve
• Silicone spatula
• Digital kitchen scales
• Piping bag and nozzle, when piping
• Palette knife or cake scraper, when covering a cake

Storage and Freezing

Storing

Transfer the chocolate fudge buttercream to an airtight container and keep it in the refrigerator for up to 4–5 days.

Before using, allow it to come completely back towards room temperature, then beat it with an electric hand whisk or stand mixer until smooth, light and creamy again.

Buttercream is generally at its best for both flavour and texture when it is not fridge-cold. However, in a particularly warm room, keep buttercream-covered cakes and cupcakes refrigerated to prevent the frosting becoming too soft.

Making Ahead

The buttercream can be prepared 2–3 days ahead and kept in an airtight container in the refrigerator.

Bring it back to room temperature and beat thoroughly before decorating. Avoid trying to spread fridge-cold buttercream over a cake because its firmness can damage the sponge.

Freezing

Freeze the buttercream in an airtight container for up to 1 month.

Defrost it overnight in the refrigerator, then allow it to come completely to room temperature.

Beat thoroughly until smooth and fluffy again. If it remains a little too firm, add a small amount of cream while mixing.

Nutrition

Serving: per 100 g

Calories: 514.06 kcal · 26% DV
Total Fat: 34.59 g · 49% DV
Carbohydrates: 52.45 g · 20% DV
Sugars: 46.72 g · 52% DV
Protein: 2.23 g · 4% DV
Sodium: 32.57 mg · 2% DV
Fibre: 2.56 g · 9% DV

% Daily Values are based on a 2,000-calorie diet.

Nutritional information is provided as an estimate and may vary depending on the exact ingredients, brands and serving size used.

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