Preheat oven to 375 degrees. Lightly grease cookie sheet.
In a large bowl, blend by hand 1 cup sugar, 1 cup pumpkin, 1/2 cup oil, and 1 egg. (Note- I don't recommend using an electric mixer with this recipe. I tried it once, and I thought it changed the texture of the cookies. It seemed to make them tough).
In a small bowl, mix together 2 cups flour, 1/2 tsp salt, 1 (generous) tsp cinnamon, 2 tsp baking powder. Sift and add to the wet ingredients. Stir until combined
Dissolve 1 tsp baking sod in 1 tsp milk and 1 tsp baking powder. Add it to the cookie mixture. Stir to combine.
Stir in 1 cup of chocolate chips (and 1/2 cup nuts, if using)
Drop dough by teaspoonfuls onto the grease cookie sheet.
Bake 10-12 minutes. Be careful not to overcook. The cookies should be soft and moist.