Choc-Mallow Cake

125g butter
1tsp vanilla essence
1/2 cup caster sugar
1 egg
2tbls golden syrup
2 1/2 cups SR flour
1 1/4 cups milk
2 tbls cocoa
1/4 cup milk extra
100g white marshmallows
100g dark chocolate chopped
30g butter, extra

Lightly grease a round springform pan
Cream butter, essence, sugar egg and golden syrup until fluffy.  Stir in half the sifted flour and half the milk, stir in remaining flour and milk.  Place half the mixture into another bowl, stir in blended sifted cocoa and extra milk.  Drop alternate spoonfuls of mixture into pan, run a knife though the mixture to give marble effect.  Bake in mod oven for 45 mins.  Remove from oven, place a layer of marshmallows evenly on top of cake.  return to oven for further 5 mins until mallows are beginning to melt.  Cool 5 mins before remiving sides of pan, drizzle with combined chocolate and butter.