"These melt-in-the-mouth buttery biscuits are a retro teatime treat - this version has a gorgeous fluffy filling..."
INGREDIENTS
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175g butter , very soft
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60g icing sugar , sieved
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1 lemon , zested
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175g plain flour , sieved
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60g cornflour
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MARSHMALLOW FILLING
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1 egg white
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cream of tartar
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60g caster sugar
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75g white marshmallows , halved