Heat the walnuts in a wide skillet over medium heat, shaking the skillet frequently, for 5 to 15 minutes until they are toasted. Do not walk away; the walnuts will burn easily.
Line a baking sheet with parchment paper.
Reduce heat to very low and add the molasses, shaking and swirling the skillet for 2 to 3 minutes until the syrup covers all the nuts.