INGREDIENTS
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60g butter
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125g (1/2 cup) milk
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2 tsp vanilla extract
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1 egg, lightly beaten
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150g (1 cup) self-raising flour
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25g (1/4 cup) cocoa powder
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110g (1/2 cup) caster sugar
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450ml boiling water
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extra 25g (1/4 cup) cocoa powder
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extra 110g (1/2 cup) caster sugar
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icing sugar, to dust