Pour the chilled soda into both glasses first, then lower the measured ice cream slowly. Watch the foam and give it time to settle before adding the whipped cream. A large glass matters here because the soda, scoop and topping need practical room together; a smaller juice glass is not an equivalent container.
Prepare a few mini chips near the piping area, then add the cream peaks and faces. Keep the toppings light enough for the soft mound to stand, with spoons and straws ready before serving. Make the pair only when both drinkers are ready. The ice cream starts melting as soon as it meets the soda, so a long wait changes the texture of this serving.
Timing and servings are estimates. Equipment, ingredients and portion sizes affect the result.
