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1
Preheat oven to 350u00b0F and lightly grease a 9x13 pan.
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2
Make the cake. Beat butter and sugar together until fluffy; add the vanilla and eggs, one at a time, stirring well after each addition. Sift together flour, ground ginger, nutmeg, and salt and then add to the butter and sugar mixture, beating until fully incorporated. This will be a very thick batter. Fold in the cranberries, chocolate and ginger. Spread the batter in the pan and bake for about 30 minutes or until light golden. Let the cake cool before adding the frosting.
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3
Make the frosting. Using the paddle attachment on an electric mixer, beat the butter and cream cheese together until fluffy; add the lemon zest, vanilla, and salt; add the confectioners' sugar bit by bit until the frosting has reached your desired consistency (you may need less than the suggested amount). Spread the frosting evenly over the cake, and scatter the cranberries on top of the frosting immediately.
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4
Make the drizzle. In a double boiler, melt white chocolate; once it is smooth, use a spoon and drizzle across the top of the frosted and cranberry-festooned cake.
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5
Slice the bars immediately after applying the white chocolate drizzle. Slice in half lengthwise, and then slice into four equal parts horizontally. Slice each rectangle in half diagonally, and you will end up with 16 triangle-shaped bars.
