Preheat oven to 375°F (190°C).
Roll out the dough into long ropes, about ½ inch thick.
Starting at the narrow end of your foil cone, wrap the dough ropes around the mold, overlapping slightly to create a spiral pattern.
Pinch the ends to seal and tuck the tip under neatly.
For texture, you can braid 3 ropes together and wrap that around the opening.
Place the shaped cornucopia (with the foil still inside) on a greased baking sheet lined with parchment paper.
Brush all over with beaten egg for a shiny golden finish.
Bake for 25–35 minutes, until golden brown and firm.
Let it cool completely before carefully removing the foil mold from inside.