Combine the can of dulce de leche with the chilled heavy cream and salt in a large mixing bowl.
Add a tiny pinch of ground cinnamon, if desired.
Whisk together the ingredients using a stand mixer or hand mixer, until the heavy cream and dulce de leche thicken up.
*This should take about 4-5 minutes.
Fold in the Bourbon, and transfer the contents to freezer-safe plastic quart containers.
Freeze the ice cream for roughly 6 hours, or overnight.
When ready to serve, top with the toasted walnuts, or whatever chopped nuts you like.