Mix Sugar and Lemon Zest:
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- In a bowl, combine ½ cup of sugar with the zest of 1 lemon and set aside.
3 Prepare the Batter:
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- In a large bowl, whisk together 5 eggs, 1 cup of oil, 1 cup of yogurt, and the sugar mixed with lemon zest.
- Add 2 teaspoons of vanilla essence and mix well.
- Gradually incorporate 2 cups of flour and 2 teaspoons of baking powder, stirring until smooth.
4 Prepare the Cocoa Batter:
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- Divide the batter in half.
- To one half, add 2 teaspoons of cocoa powder and 3 teaspoons of milk, mixing well to remove any lumps.
5 Prepare the Tray:
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- Grease a 25 cm diameter tray with butter.
- Sprinkle 2 teaspoons of sugar over the buttered tray.
- Arrange pitted plums on the tray, spreading them evenly.
6 Bake:
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- Pour the two batters in layers over the plums, alternating as you wish.
- Place the tray in the preheated oven at 165°C (329°F).
- Bake until the toothpick test passes, around 30-40 minutes.