INGREDIENTS
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4 1/2 ounces macadamia nuts, toasted and roughly chopped
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2 sticks (1 cup) unsalted butter, at room temperature
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3/4 cup powdered sugar, plus at least 1 1/2 cups more for coating
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1 teaspoon ground ginger
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1 teaspoon finely grated lemon zest
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1/2 teaspoon kosher salt
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1 teaspoon dark rum
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2 cups flour, measured then sifted
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1/4 cup candied ginger, finely diced