Use plain pumpkin puree, not pumpkin pie filling. Chill dough before baking to prevent spreading. Measure flour using spoon-and-level method. Adjust frosting consistency with milk or powdered sugar as needed. Store cookies airtight at room temperature up to 3 days or freeze for longer storage. Both unfrosted cookies and frosting freeze well. Variations include adding nuts, chocolate chips, or using vegan substitutions.