I do mine with 90% floor malted Bohemian Pilsner malt, 5% Floor malted Bohemian wheat malt, 3% Melanoiden Malt and the rest acid malt to get my mash PH correct, 2 hop additions first wort hops and the rest with 10 minutes of the boil remaining. I brew this with anywhere from 24-34 IBU's, but I only use one noble hop variety, depending on what I have. The thing that most people don't understand is the subtle differences in Kolsch bier, if you go to Cologne and have them, you can taste this for yourself. For instance, have Malz muhle and it will be slightly malty, have Sion and you'll understand the dry yeast finish that everyone talks about, have Peters and you will taste a balanced Kolsch, have a Fruh and you'll have a fruitier Kolsch or a Pfaffen and you'll taste a hoppier Kolsch. If you can't already tell I am in love with Kolsch beer and travel to Cologne regularly to truly appreciate this beer. Now for a rant, I absolutely hate when I read about people making a Kolsch style that has to be this or that, especially when you read the guidelines for Kolsch, I mean really go to Cologne and taste the difference in every brewery. I will admit this is one style that took me years to truly appreciate the subtle differences in each one.