Preheat an oven to 375 degrees F (190 degrees C). Grease 2 baking sheets.
Stir the flour, oats, baking powder, cinnamon, nutmeg, pumpkin pie spice, ginger, and salt in a bowl.
Beat the butter and brown sugar with an electric mixer in a large bowl until smooth.
Add 1 egg and allow it to blend into the mixture before adding the other along with the vanilla.
Add the pumpkin and apple butter; continue beating.
Mix in the flour mixture until just incorporated.
Fold in the walnuts, mixing just enough to evenly combine.
Drop spoonfuls of the dough 2 inches apart onto the prepared baking sheets.
Bake in the preheated oven until the edges are golden, about 12 minutes. Allow the cookies to cool on the baking sheet for 1 minute before removing to a wire rack to cool completely.
#1 Pumpkin Spice Cookies · Dinner Match Lab | Dinner Match Lab