Mash the bananas and stir in the sugars.
Next add the flour, salt and baking powder.
Add the Guinness, the butter and fold in the white chocolate chips and pecans.
Spray your 9 x 5 loaf pan with nonstick spray.
Add your batter to then pan and bake on 350 degrees for 60 minutes.
Let it cool in the pan for 5 minutes and remove to your serving plate.
Let it cool an additional 10 minutes before slicing.