INGREDIENTS
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120g unsalted butter, at room temperature
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30g shortening
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50g caster sugar
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150g brown sugar
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1 egg
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1/2 teaspoon vanilla extract
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220g plain flour, sifted
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1/2 teaspoon baking powder, sifted
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1/2 teaspoon baking soda, sifted
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1/2 teaspoon salt
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250g chocolate chips