Mix together the base layer ingredients (pumpkin puree, almond butter, pumpkin pie spice, maple syrup, and salt)
Smooth the base layer mixture onto a baking sheet
Freeze for 10 minutes
Melt chocolate chips and coconut oil together
Pour the melted chocolate mixture on top of the first layer
Sprinkle crushed walnuts and flaky/coarse salt on top
Freeze until solid
Break into pieces and store in the freezer
