Whisk together oil and sugars. Whisk in egg, pumpkin, and vanilla till smooth.
Combine the dry ingredients in a small bowl and whisk till blended. (You can leave out the nutmeg and cloves if you prefer, or add more cinnamon in their place.) Add to the wet ingredients and stir gently till just combined.
Fold in the chocolate chips.
Drop by spoonfuls onto greased cookie sheets.
Bake at 350° for 10-12 minutes or till set in the middle. After a couple minutes, remove to cooling racks to cool.