Cream butter and sugar, add bananas and egg and beat well. Sift dry ingredients (or if you are like me and you can't find your sifter, stir with wire wisk). Add slowly to the banana mixture until just incorporated. Fold in vanilla and pecans. Spray coat your muffin tins and these should pop right out. Bake for about 15 to 20 minutes or until done. Remember what your home economics teacher taught you about not over mixing muffins - oh the shame of tunneled baked goods!