Preheat oven to 325 degrees. Line a cookie sheet with a baking mat or parchment paper.
To make the cookies/shells, melt butter in a skillet with molasses, sugar, and brown sugar over medium heat, stirring constantly with a wooden spoon. Allow to bubble and cook for one minute, then turn off heat.
Dump in flour, ginger, and salt. Stir together quickly until just combined, then stir in brandy.
Use a tablespoon to spoon mixture onto cookie sheet; do only eight cookies per sheet, as they will spread out in the oven.
Bake for 10 minutes, or until bubbling in the oven. Remove cookie sheet from oven and allow to cool on the pan for 2 to 3 minutes. Lift up circles one at a time and drape them over a cannoli mold (or a large metal handle of a whisk or potato masher!) The cookies will naturally drape over the mold; help it along by pressing the seal.
Slide cookies off the mold and set them on a cool plate. Repeat with remaining cookies. Be prepared to slightly reshape cookies as they cool. Fill with cream filling when completely cool.
Combine cream, sugar, and brandy (make sure cream is very cold.) Place into a cold mixing bowl (chill ahead of time) and mix on high until cream is very stiff. Place cream into a pastry bag fitted with a large tip. Carefully fill cooled brandy snaps. Serve within a couple of hours.