Ingredients

• 3 (12 ounce) cans frozen limeade concentrate, thawed
• 12 fluid ounces vodka
• 1 drop green food coloring, or as desired (optional)
• 1 (2 liter) bottle lemon-lime soda (such as 7-Up®), divided

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Instructions

1. Mix limeade concentrate with vodka, green food coloring, and 1 1/2 liters of lemon-lime soda in a large plastic container with a lid. Cover the container and freeze the mixture for 1 to 3 days. Scoop the frozen slush into glasses and add a splash of the remaining lemon-lime soda to each glass.