Gather a long sheet of tin foil and scrunch it up into the shape of a cornucopia (solid form), approximately 12-inches long, and as thick as you desire. Make it big, so you can add lots of desserts or other foods.
Preheat oven to 400 degrees F.
Next, roll out puff pastry and cut into 1 inch strips. Begin constructing the cornucopia by wrapping each strip of pastry around and around the tin foil. After approximately 20 strips, the entire foil inner will be covered. Cut out decorative leaves with the remainder of dough and decorate the top of the cornocopia.
When it's finished brush with egg wash. Bake until golden, about 20 minutes.
Once it has cooled, pull the inner tin foil out from the inside. You can fill it with brownies, squares, and cookies.