First, make the pudding. Follow the box directions. After cooking, whisk in the pumpkin and pumpkin pie spice until well combined. Refrigerate until cold.
Once the pudding is cold, layer everything into cups. Put the ground ginger snap cookies first, then pudding, then more cookies, more pudding, then the whipped cream on top. You can garnish with a cinnamon stick if you’re really fancy.
You can make the pudding a day or two ahead of time and assemble before serving if you’re making these for friends. Or eat them all yourself over the course of two or three days.
Notes
You can make the pudding a day or two ahead of time and assemble before serving if you’re making these for guests.