INGREDIENTS
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3 eggs
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1 cup sugar
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1 teaspoon orange juice
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1 teaspoon grated orange zest
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1 3/4 cups all-purpose flour
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1/4 cup cornstarch
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1 1/2 teaspoons baking powder
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1 teaspoon baking soda
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1 cup sour cream
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1 cup unsalted butter, melted
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Icing
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1 cup unsalted butter
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2 tablespoons orange juice
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2 1/2 cups confectioners' sugar, sifted
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1/4 cup cointreau or grand marnier