INGREDIENTS
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2 sticks butter, softened, plus more for greasing
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8 ounces all-purpose flour, plus more for dusting
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8 ounces caster sugar (superfine)
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Finely grated zest of 1 orange
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4 eggs
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1 teaspoon baking powder
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Juice of 2 oranges, for cake, filling, and icing
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For the orange filling
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1 stick plus 1 tablespoon butter, softened
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8 ounces icing sugar (confectioners'), sifted
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Finely grated zest of 1 orange
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For the orange glace icing
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Orange juice, as needed
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11 ounces icing sugar (confectioners'), sifted
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Crystallized flowers, for decorating, optional