Cream butter & sugar. Add Smucker’s crunchy peanut butter, mix; add mashed bananas, mix. Add eggs + vanilla/butternut flavoring, mix; add milk. Add the gluten free flour, then add 1/4 tsp. salt, 1 tsp. soda, 1 tsp. xanthan gum, and 1 1/2 tsp. baking powder; mix. Pour the batter into four small sized *loaf pans greased and lined with wax paper. Bake 50 minutes at 350 degrees ‘til a straw comes out clean. *If you use medium sized loaf pans, you may need to add additional baking time.