In a small bowl, whisk together the yogurt and sugar-free banana pudding mix until smooth and fully combined.
Place the vanilla wafers in a zip-top bag and crush them into small pieces using a mallet, rolling pin, or the back of a heavy spoon. Set aside.
Slice the banana into thin rounds and set aside.
Assemble the pudding by layering the yogurt mixture, banana slices, and crushed vanilla wafers in a serving bowl or jar. Repeat the layers as desired, depending on your preferences and the size of your dish.
Finish with a dollop of whipped cream and a sprinkle of extra crushed vanilla wafers, if desired.
Chill in the fridge for 15-30 minutes before serving for a thicker, more pudding-like texture.
