Ginger cake

Ingredients

• 1 1/2 cup (300g) firmly packed brown sugar
• 1 1/2 cup (225g) plain flour
• 1 1/2 cup (225g) self-raising flour
• 1/2 teaspoon bicarbonate of soda
• 1 tablespoon ground ginger
• 2 teaspoon ground cinnamon
• 1 teaspoon ground nutmeg
• 250 gram butter, softened
• 2 eggs
• 1 cup (250ml) buttermilk
• 1/2 cup (175g) golden syrup
• 60 gram butter, softened
• 2 teaspoon finely grated lemon rind
• 2 tablespoon lemon juice
• 2 cup (320g) icing sugar mixture