""This extra-moist cake with buttercream icing is sure to get firework-worthy oohs and aahs!"..."
INGREDIENTS
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cooking spray
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1 (18.25 ounce) package white cake mix
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1 (3.5 ounce) package instant French vanilla pudding mix
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3/4 cup water
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3/4 cup vegetable oil
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4 eggs
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1 drop red food coloring, or as needed
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1 drop blue food coloring, or as needed
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1 cup butter-flavored shortening
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1 cup unsalted butter at room temperature
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1 teaspoon salt
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1 tablespoon clear imitation vanilla extract
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8 cups confectioners' sugar
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1 cup heavy cream