Chocolate Swirl Cake

I made this for my birthday party last Sat. The chocolate part is very rich, but delicious!

Serves 8-10

250g butter, softened
1 1/4 cups caster sugar
2 tsp vanilla essence
4 eggs
2 1/4 cups plain flour
2 1/4 tsp baking powder
1 cup milk
1/2 cup melted dark chocolate
1/2 cup cocoa powder

vanilla icing
1 1/2 cups icing sugar
2 tbsp water
1 tsp vanilla extract

Preheat oven to 160°C.
To make the vanilla icing, place icing sugar, water & vanilla in bowl & mix to combine, then set aside.
Place butter, sugar & vanilla in bowl of electric mixer & beat until light & creamy.
Gradually add eggs & beat well.
Sift flour & baking powder together over butter mixture & combine.
Fold through milk.
Divide mixture in half.
Add melted chocolate & cocoa to one portion & mix to combine.
Place chocolate mixture into lightly greased 25cm fluted bundt tin.
Drop spoonfuls of vanilla cake mixture into tin & swirl with butter knife to achieve marbled effect.
Bake for 50-55 min or until cooked when tested with skewer.
Cool on wire rack & spoon over vanilla icing.
Mmm-mmm!