First mix the flour, cornstarch, sugar, salt and baking powder together in a bowl.

Then mix the liquid ingredients, vanilla extract, plant drink (150ml) and the softened butter or margarine together in another, smaller bowl.

Now add the liquid ingredients to the dry ones and stir together. But only until everything is well mixed.

Now preheat the oven to 180 ° top / bottom heat.

Grease and flour the baking pan well.

Half of the light dough can now be poured into the mold.

The second half is now mixed with a little rum, cocoa powder and 1-2 tablespoons of plant-based drink to form the dark dough.

Again, do not stir for too long, only until a smooth dough has formed.

Now place the dark dough on top of the light dough in the mold. Roughly go through the two doughs with a fork or chopstick and use them to create the marble pattern.

Now the cake can be put in the oven for 45-55 minutes.

Do the chopsticks test at the end, as every oven is a little different.