Place your serving glass in the freezer for about 20 to 30 minutes before assembling the float. This helps keep everything colder for longer. A chilled glass also slows down the melting process of the ice cream.
Remove the chilled glass from the freezer and place a generous scoop of vanilla ice cream inside. Position the scoop in the center of the glass. The ice cream forms the creamy base of the float and creates its signature texture.
Carefully pour the chilled cream soda over the ice cream. Pouring slowly is important because the soda will immediately create foam. Stop pouring when the liquid reaches just below the rim of the glass.
Allow the float to sit for a few seconds as the foam settles naturally. This helps prevent spills and creates an attractive layered appearance. The ice cream will begin blending with the soda to create a creamy vanilla flavor throughout the drink.
Top the float with whipped cream, sprinkles, caramel sauce, chocolate syrup, or a cherry if desired. These additions make the float look even more inviting. They also add extra flavor and texture.
Serve the float right away with a long spoon and straw. The best texture happens when the ice cream is slowly melting into the soda. Enjoy it while it's cold, frothy, and creamy.