Preheat oven to 350º F. Line cookie sheets with parchment paper
Combine together flour, baking soda, baking powder, salt, cinnamon, nutmeg, ginger and cloves. Set aside.
In large mixing bowl beat butter and brown sugar until creamy.
Add eggs, one at a time, beat until combined.
Beat in vanilla and pumpkin until combined.
Gradually add in dry ingredients and mix until combined.
Stir in chopped pecans. I do this by hand to prevent pecans from breaking up too much.
Drop heaping teaspoon of dough onto prepared cookie sheet. I use two teaspoons to drop dough onto cookie sheet.
If desired, top with 1/2 pecan.
Bake 350º F oven for 11-13 minutes until top of cookies are slightly brown.
Remove to wire rack to cool completely.