In the bowl of a food processor, process gingersnap cookies and walnuts until finely ground. Set aside. (You may have to do this batches if you have a smaller food processor).
In a large bowl, sift together 1 cup powdered sugar, sea salt, cinnamon, nutmeg and cloves.
Add cookie/walnut mixture and mix well.
Stir rum, molasses and honey together in small bowl, then add to cookie mixture. Mix until uniform.
Chill in the refrigerator for 30 minutes. Combine 1/4 cup sugar and 1 tbsp cinnamon in a shallow bowl and set aside.
Scoop out tablespoon portions, roll into balls and toss to coat in cinnamon sugar mixture.
Place on parchment lined baking sheet, cover with plastic wrap and refrigerate for 2 hours before serving.