01 - 
                Preheat oven to 350°F. Line a muffin pan with cupcake liners.
              
              
              
                02 - 
                In a large mixing bowl, combine cake mix, vegetable oil, egg whites, and lemon-lime soda. Mix on medium speed with a hand mixer until fully incorporated.
              
              
              
                03 - 
                Gently fold in the lime gelatin mix, taking care not to overmix.
              
              
              
                04 - 
                Pour batter into liners filling each about two-thirds full. Bake for 18 to 20 minutes until a toothpick inserted comes out clean. Let the cupcakes cool completely before frosting.
              
              
              
                05 - 
                Beat softened butter and cream cheese with a hand mixer until fluffy, approximately two minutes.
              
              
              
                06 - 
                Mix in vanilla extract and lime gelatin mix until evenly combined.
              
              
              
                07 - 
                Gradually add powdered sugar one cup at a time, adding a tablespoon of half and half between each addition. Continue mixing until stiff peaks form.
              
              
              
                08 - 
                Add green food coloring dropwise until desired hue is achieved. Transfer frosting to a piping bag and decorate the cooled cupcakes. Finish by sprinkling with green sprinkles.