Marble Loaf Cake

Preheat your oven to 170°C (338°F). Prepare a 24 cm loaf pan by lining it with air fryer liners, they fit perfectly and make cleanup a breeze. If you don’t have liners, simply use baking paper to line the pan.

Make sure your eggs are at room temperature. This helps them whip up more easily, creating a lighter, fluffier batter that’s perfect for a soft, tender marble loaf.

We’re using liquid glucose in this recipe as it helps keep the loaf soft and moist while giving it a beautiful sheen. You can find it at most spice stores, and it’s very affordable. Keep in mind, liquid glucose is quite sticky and can be a bit tricky to work with. To make it easier, try using a small spoon or a silicone spatula to measure and scrape it out, and lightly oil your hands or tools if needed to prevent it from sticking.

Add the room-temperature eggs, liquid glucose, and castor sugar into your stand mixer.

Beat  for about 9 minutes at a steady speed (around speed 4 on a stand mixer), until the mixture becomes light, airy, and creamy. No stand mixer? No problem! You can get the same fluffy result with a hand mixer or even a whisk, though it will take a bit more elbow grease.

Sift together the cake flour, cornflour, and baking powder. This removes any lumps and evenly distributes the raising agent, ensuring a lighter, finer crumb and a more delicate marble loaf.

Add the sifted dry ingredients to the beaten mixture, folding gently until just combined.

Gently warm the milk until just lukewarm – not hot. Add the warm milk, vanilla essence and melted butter to the batter, folding gently until smooth and fully incorporated.

Next, prepare the chocolate swirl batter. In a separate bowl, combine the cocoa powder, white granulated sugar, and boiling water, stirring until smooth.

Remove ¼ of the vanilla batter and add the cocoa paste.

Mix together until well combined.

Pour the plain vanilla batter into the prepared pan.

Pour the chocolate swirl batter down the centre of the pan, directly over the vanilla batter.

Using a skewer, gently swirl the chocolate batter through the vanilla batter to create a marble effect.

Work lightly and avoid over-swirling, just a few figure-eight or zigzag motions are enough. Too much swirling will blend the batters together rather than creating defined marbled ribbons. For best results, keep the skewer mostly in the centre and drag it slightly towards the edges for a balanced pattern throughout the loaf.

Bake for 55-60 minutes in the preheated oven. Bake on conventional (normal) oven mode, not fan-forced. Fan mode circulates hot air too aggressively, which can cause the loaf to rise unevenly, crack too quickly on top, or dry out before the centre is fully baked. Using normal oven mode allows the cake to rise gently and bake evenly, giving you a soft, moist crumb with a well-defined marble pattern.

Once baked, insert a skewer into the centre of the loaf, it should come out clean or with just a few soft crumbs attached. The top should be golden and spring back lightly when pressed.

Remove the marble loaf from the pan and carefully peel away the liner.

The underside of the cake will be smooth and perfectly baked.

Allow the loaf to cool slightly, then slice and enjoy.

Don’t be surprised if the first slice doesn’t have much marbling; it may look more uniform, but it’s still beautifully soft and delicious.

The true marbled effect will appear in the following slices, showcasing the swirls of chocolate and vanilla in all their glory.

When you break into a slice, you’ll notice a delicate, light crumb that holds together beautifully without being dense or heavy. The combination of vanilla and chocolate batters creates a moist, melt-in-your-mouth texture that’s irresistible.

Serve as is, dusted lightly with icing sugar, or with a generous spread of butter. It’s perfect alongside a cup of tea or coffee, and even better slightly warmed for an extra-soft crumb.

Store the marble loaf in an airtight container at room temperature for up to 3 days. For longer storage, wrap slices individually and freeze for up to 2 months. Thaw at room temperature or warm gently before serving.