8 fluid ounces lemon-lime flavored carbonated beverage
1 fluid ounce pineapple juice
1 (3 ounce) package instant vanilla pudding mix
Fill a tall glass with ice cubes and pour in lemon-lime soda. Stir gently.
Gently pour in pineapple juice and vanilla pudding mix. Serve in a tall glass with garnish with lemon marshmallows.