If you’re adding the cake filling, prepare the cake mix according to the package instructions. Let it cool completely before crumbling and mixing with the chocolate frosting.
Using a sharp knife, carefully cut off the pointy tips of the sugar cones, about 1-2 inches. You want to create a hole big enough to fit three pretzel sticks snugly. Don’t cut too much off—just enough to fit the pretzels.
In a microwave-safe bowl, melt the semisweet chocolate chips in 30-second increments, stirring between each interval until smooth. Let it cool for about 5 minutes.
Dip the top inch of each cone into the melted chocolate, letting the excess drip off. Then, dip it into the fall-colored sprinkles.
For added fun, dip the bottom of the cone into the chocolate and sprinkles as well. Place the decorated cones on a baking tray lined with parchment paper.
Dip the ends of three pretzel sticks into the melted chocolate and insert them into the top of each cone. Hold them in place for a few seconds to let the chocolate set. Transfer the tray to the fridge for about 10 minutes to let the chocolate harden.
Once the cones are set, remove them from the fridge. Gently fill each cone with the cake and frosting mixture. Be careful not to overpack or press too hard to avoid breaking the cone. Support the pretzel sticks while filling to keep them from falling out.
Keep your Teepee Sugar Cones refrigerated until you’re ready to serve. They’re best enjoyed within a few days as the cones may soften over time.