Line a baking sheet or a few plates with parchment paper and clear a space in your freezer for them.
In a small pot, bring maple syrup, cocoa powder, and coconut oil to a boil over medium heat, stirring to combine. Let boil for 1 minute, then remove from heat.
Stir in almond butter, vanilla and salt until thoroughly incorporated. Stir in walnut halves and cranberries.
Drop spoonfuls of the mixture onto the parchment paper. Place in freezer to set; this will take 20-30 minutes. Once set, transfer to a covered container and store in the fridge.