1. Preheat the oven to 350°F (175°C). Lightly grease a 9 inches (23cm) springform tin and line with baking parchment. Set aside. Melt the butter in the microwave and let cool down a bit.

 

2. Add the yogurt, sugar, eggs, and vanilla extract to a large bowl and mix until well combined. Add the melted and cooled butter and mix in. Mix the flour with baking powder, and orange zest and add to the large bowl – mix until just combined. Add the (still) frozen berries and fold in. Pour the batter into the prepared baking tin and smooth out the top. Bake for 45-50 minutes or until a wooden skewer inserted into the center comes out clean. Take out of the oven and let cool down in the tin for some time, then remove and let cool down completely on a wire rack.

 

3. Cut out a paper star or some pattern, place it on top of the cake and dust the cake with confectioners’ sugar so you can see the star/pattern.