Add the heavy whipping cream to the bowl of your stand mixer. Set your mixer to medium-high speed and use the whisk attachment to whip the cream until stiff peaks form.
Add the vanilla and vodka, whisking until just combined.
Add the cinnamon and kosher salt, then whisk again until everything looks evenly mixed.
Remove the bowl from the mixer. Use a spatula to gently fold the sweetened condensed milk. Be careful not to deflate the whipped cream.
Gently spoon the mixture into a 9x5-inch loaf pan or individual paper containers. Smooth the top, then cover with plastic wrap or parchment paper. Freeze for at least 6 hours or overnight.