Zest an orange and set aside. In a medium saucepan, add freshly pressed orange juice and raisins. Bring everything up to a simmer and switch the heat off. Let the raisins soak in the hot orange juice for 15 minutes.
1 1/2 cup raisins, 2 oranges
Preheat the oven at 350°F (180°C). Grease a bundt tin with butter.
Meanwhile, in a large bowl, cream softened butter and sugar.
1 cup butter, 1 cup granulated sugar
Add egg yolks one by one while stirring.
4 eggs
Add flour, baking powder, pinch of salt, vanilla extract, orange zest, and milk. Mix until well combined and smooth. Make sure not to overmix the batter at this point.
In a separate bowl, beat egg whites until stiff peaks form.
4 eggs
Drain the raisin mixture and gently fold them into the batter along the beaten egg whites until just combined.
Pour the batter into a prepared tube pan or bundt cake pan. Bake in a preheated oven at 350°F (180°C) for 55-60 minutes, or until a toothpick inserted into the center comes out clean.
Allow the cake to cool in the pan for 10 minutes, then transfer to a wire rack to cool completely. Dust with icing sugar. Slice and serve.
Video
Notes
Soak raisins: To ensure juicy, plump sweet raisins in your cake, soak them in the hot orange juice mixture for at least 15 minutes before using.Cream well: Cream the butter and sugar thoroughly to achieve a light and fluffy cake texture.Fold gently: Be careful not to overmix the batter when folding in the beaten egg whites and raisins to preserve the cake's light texture.