INGREDIENTS
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For the sweet butter pastry
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2 cups (8 3/4 ounces) all-purpose flour, plus more for the work surface
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Pinch of fine sea salt
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2/3 cup (5 ounces) cold unsalted butter, diced
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1 large egg
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1/3 cup (2 ounces) superfine (caster) sugar
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For the salted butter filling
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1/2 recipe Sweet Butter Pastry (see above)
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1 1/4 cups (9 ounces) superfine (caster) sugar
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1/2 cup (4 ounces) salted butter, diced
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1 cup whipping cream
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Lightly whipped cream, for serving (optional)