If you want a showstopping chocolate cake that is also wonderfully simple to make, the Mary Berry All-in-One Chocolate Cake Recipe is exactly what you need. This beloved recipe replaces complicated multi-stage baking with a single bowl and just a few minutes of mixing. The result is a rich, deeply chocolatey sponge with a moist, tender crumb that genuinely tastes like it took hours. Whether you are baking for a birthday, a celebration, or simply a cozy weekend treat, this recipe has well and truly earned its place as a British baking classic.

Ingredients for Mary Berry All-in-One Chocolate Cake

Essential Ingredients

For this recipe you will need 225g self-raising flour for structure and lift, 225g caster sugar for sweetness, 225g softened butter for richness, 4 large eggs to bind everything together, 4 tbsp cocoa powder for a deep chocolate flavour, 2 tsp baking powder for extra rise, and 4 tbsp warm milk to loosen the batter to exactly the right consistency.

See more Mary Berry Recipes:

Ingredient Tips and Substitutions

Softened butter is essential — cold butter will not blend smoothly. Plain flour works if you add an extra two teaspoons of baking powder. Dutch-processed cocoa gives a richer, darker flavor. For a dairy-free version, use plant-based butter and oat milk.

Step-by-Step Method to Make the Cake

Preheat your oven to 180°C (160°C fan / Gas Mark 4) and grease two 20cm sandwich tins.
Line the base of each tin with baking parchment to prevent sticking.
Place the flour, sugar, softened butter, eggs, cocoa powder, baking powder, and warm milk into one large mixing bowl.
Beat with an electric hand mixer on medium speed for two minutes until the batter is completely smooth.
Divide the batter equally between the two tins and level the tops with a spatula.
Bake on the center shelf for 25 to 30 minutes.
Test by pressing gently on top — the sponge should spring back firmly.
For extra certainty, insert a toothpick into the center; it should come out clean with no wet batter.
Cool in the tins for five minutes, then transfer to a wire rack and cool completely before frosting.

Tips for a Perfect Chocolate Cake

Common Mistakes to Avoid

Always weigh ingredients with kitchen scales — even small errors cause inconsistent results. Overmixing after the batter comes together develops the gluten and leads to a dense sponge, so stop as soon as it looks smooth. Never open the oven during the first 20 minutes, as a sudden temperature drop causes the middle to sink.

Expert Baking Tips

Add a tablespoon of sour cream to the batter for an extra-moist crumb. Always use room-temperature eggs — they blend far more smoothly than cold ones. Make sure the sponges are completely cool before frosting, as a warm cake causes buttercream to melt.

Serving Suggestions

How to Serve

Sandwich the sponges with a generous layer of chocolate buttercream and spread more on top. Add chocolate shavings or a dusting of icing sugar for a polished finish.

Best Pairings

This chocolate cake pairs perfectly with a warm cup of English Breakfast tea or a strong filter coffee. For a more indulgent dessert option, serve a warm slice alongside a generous scoop of vanilla ice cream.

Storage and Reheating Tips

Keep the frosted cake in an airtight container at room temperature for up to three days. Wrap unfrosted sponges individually in cling film and freeze for up to two months. To refresh a sponge that has been in storage, place it in a preheated 160°C oven for five to six minutes until just warm.

FAQs

Can I make this cake in advance?

Yes. Bake the sponges up to two days ahead and store unfrosted in an airtight container.

Can I freeze it?

Yes — wrap cooled sponges tightly and freeze for up to two months.

Does it work with gluten-free flour?

Yes, use a good-quality gluten-free self-raising blend.

Why did my cake sink?

Opening the oven door too early is the most common cause.

Can I use oil instead of butter?

You can, but butter gives a noticeably better flavor and texture.

How do I know when it is done?

A toothpick inserted in the center should come out clean.