Gather the ingredients.
Place the dark chocolate in a heat-proof bowl and set aside.
Add the heavy cream and pumpkin puree to a saucepan over medium heat. Stir to combine.
Add the spices and salt. Allow the pumpkin mixture to come to a boil, stirring occasionally. Then, remove the pan from the heat.
Pour the pumpkin mixture over the dark chocolate. Let them sit for at least 30 seconds.
Whisk the dark chocolate pumpkin truffle mixture vigorously until smooth.
Once the mixture is just warm and no longer very hot, whisk in the butter. Mix until combined.
Add 5 packs of Pop Rocks and whisk to combine.
Cover the bowl with plastic wrap and refrigerate for at least 2 hours, or until the mixture has firmed up.
Line a plate or baking sheet with parchment paper.
Scoop the truffle mixture onto the lined plate, using about 2 teaspoons per truffle.
Refrigerate the dark chocolate pumpkin truffles for 30 minutes or until set.
Melt the dark chocolate in the microwave.
Coat the truffles with dark chocolate, then top them with the remaining Pop Rocks.
Chill the truffles for another 30 minutes to 1 hour before serving. Enjoy!