Start by preheating your oven to 350°. Butter and flour or spray three 6” inch pans (or two 8” or 9” pans), and set aside. In a medium-size bowl, combine the butter and sugars. Mix well. Add eggs, mixing until thoroughly incorporated.
Add spices, salt, baking powder, and both flours. Mix until just incorporated. Fold in pears. Divide batter evenly between 3 pans.
Bake for 25-30 minutes, or until a toothpick comes out clean and the edges are a golden brown. Cool completely.