Pre-heat oven to 350 degrees F and grease a standard loaf pan.
I like to use my food processor but a potato masher (for the bananas) and a wooden spoon works great as well. In a food processor puree the bananas, butter, lemon juice and sugar (brown and white) together.
Add the eggs and milk and pulse the machine to combine.
Add the dry ingredients and pulse gently until it is just combined.
If you have a soft touch with your food processor you can add the raisins and mix them into the batter with the machine but if you are worried that you will chop them up too much then take the bowl part off the machine, remove the blade and mix them in with a spoon or spatula.
Pour the batter into your prepared loaf pan and spread it evenly in the pan. Bake at 350 degrees F for about 50 minutes. When a cake tester comes out clean it is done. Remove it from the loaf pan and let it cool on a rack (if you can wait).