The first thing I had to do was make the ganache, which is just cream and chocolate. When that was cooled I piped it into a mini ice cream cone. You can see them to on the left side of the picture in a bowl. Then we made the cookies that would be the bottom part of the hat.
After baking the cookies we let them cool and then trimmed them to be sure they were round. Then we put the cones on and they looked like this. If you overfill the cones a little the ganache will act like glue to keep them in place.
Next step was to get them ready to cover in chocolate so we spread them out on a cooling rack with some parchment paper under the rack to catch the drips.