A day ahead, use one can of Dr. Pepper soda and divide it among an ice cube tray. Freeze for at least 6 hours or until frozen solid (times may vary depending on the size of the ice cube tray).

In a blender, add the frozen soda ice cubes. Add an ice-cold, refrigerated can of Dr. Pepper and blend until smooth, with no chunks remaining.

Add in a splash of cream and blend again until smooth. Pour into a glass, leaving a few inches of space at the top. Stir in a little more refrigerated Dr. Pepper, then top with a dollop of whipped cream.