Grease and line a 23cm springform cake tin and set aside. Preheat the oven to 180°C.
Sift the flour, baking powder, cocoa powder, spices and salt into a medium bowl and set aside.
300 g all-purpose flour, 2 teaspoons baking powder, 2 tablespoons cocoa powder, 1 teaspoon cinnamon, ½ teaspoon nutmeg, ¼ teaspoon all spice, ¼ teaspoon salt
In a separate large bowl, cream the butter (make sure it’s at room temp!) and 200g of muscovado sugar together using a hand mixer until pale and creamy. Beat the eggs in one at a time, making sure each is incorporated before adding the next.
180 g butter, 250 g muscovado sugar, 3 eggs
Add a third of the dry ingredients, mixing until just incorporated. Mix in a third of the yogurt. Repeat until all the dry ingredients and yogurt have been added, mixed in and just come together into a thick batter.
200 ml vanilla yogurt
Spoon the batter into the prepared cake tin and smooth the surface. Nestle the plum pieces into the batter, cut side down, pushing them gently into the batter. Scatter the remaining muscovado sugar all over the top.
6 plums
Place the cake in the oven and bake for 50-60 minutes. The cake is ready when the surface is set and a skewer inserted into the middle comes out clean – but don’t stab through a piece of plum!
Let the cake cool completely in the pan, loosening the springform tin after 10 minutes or so.
Serve as is or dusted with icing sugar. Pairs really well with tea.
Icing sugar