In a large bowl, mix the the crumbs, spices, and salt.
In a double boiler, melt the butter.
Add icing sugar and whisk until combined.
Add chocolate chips, let melt, whisk until combined.
Add rum and whisk to combine.
Remove from heat.
Add to the crumb mixture, mixing well.
In a small bowl, lightly beat the eggs and then add to the crumb mixture.
At this point, it is up to you which method you would like to use. Please see Options 1 to 3 in the body of the posting.