INGREDIENTS
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3/4 cup graham cracker crumbs
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3 tablespoons butter, melted
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8 ounces cream cheese, softened
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1 (14 oz.) can sweetened condensed milk
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1/3 cup bottled key lime juice
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1 teaspoon lime zest
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1 (8 oz.) container frozen whipped topping, thawed
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1-2 drops green food coloring (optional)