01 -
Preheat the oven to 350°F. Line a muffin tray with cupcake liners.
02 -
Combine cake mix, vegetable oil, egg whites, and lemon lime soda in a large mixing bowl. Using a hand mixer on medium speed, blend until smooth and well-incorporated.
03 -
Gently fold in the lime gelatin mix without overmixing to maintain batter texture.
04 -
Pour the batter into the prepared liners, filling each about two-thirds full to allow room for rising.
05 -
Bake for 18 to 20 minutes or until a toothpick inserted in the center comes out clean. Allow cupcakes to cool before decorating.
06 -
Beat softened butter and cream cheese with a hand mixer for approximately two minutes until light and fluffy.
07 -
Mix in vanilla extract and lime gelatin mix until evenly combined.
08 -
Gradually add powdered sugar, one cup at a time, alternating with half a tablespoon of half and half between additions. Continue mixing for two minutes until stiff peaks form.
09 -
Add green food coloring dropwise until desired hue is achieved, mixing thoroughly.
10 -
Transfer frosting into a piping bag fitted with a round tip. Pipe onto cooled cupcakes and garnish with green sprinkles.