Ingredients 1 Egg 120 g of brown sugar 150 cc of sunflower oil 1 teaspoon of vanilla essence 200 g of diced dried prunes 200 cc of milk 330 g self-rising flour 70 cc of boiling water 1 teaspoon of baking soda 70 cc of cognac Preparation 1. Place the plums, boiling water, baking soda, and cognac in a bowl. Let it sit for 12 hours. 2. Preheat the oven to its lowest setting. In another bowl, beat the egg, add the sugar, oil, and vanilla extract, and mix until smooth. 3. Add the previously soaked plums and milk and mix. Add the flour and achieve a smooth dough. 4. Cover a 9.5-inch (24 cm) diameter ring-shaped baking dish with butter. Bake at 150°C (300°F) for 40 minutes.