As other posters noted, this is absolutely the easiest homebrew to make! One of the attributes that makes this beer so easy is that the extract brewer can compete very well with an all grain brewer. In fact, extract brewers often win homebrew competitions in this category!
Here are some keys to brewing this style:
1. Use DRY malt extract. A decent one is Breiss Bavarian Wheat DME. This is 60 percent wheat malt, and 40 percent pale malt
2. Use a German noble hops (1 oz at 4-5 AA units)
3. Use a good German Wheat liquid yeast. I like Wyeast 3638 because of the higher cell counts in the "snap-packs", but White Labs is good too. They both are derived from Weinstephanen (sp?) yeast strain. Yeast is KEY to brewing this style.
Here is the recipe for 5 gallons:
Bring water to boil
Turn off you heat source
Add the wheat DME
Bring back to a boil
Add 1 oz of German Noble Hops (Hallertaur and Tettnang are my favorite varieties)
Boil for 60 minutes
Chill your wort to appropriate pitching temperature
Add Wyeast 3638 - Bavarian Wheat
Ferment for 2 weeks
Bottle or keg
That's it. It's that simple. This recipe will be as good as any commercial wheat beer you have ever had.
I am assuming that you are acquainted with extract brewing techniques. Always use proper sanitation (i.e. sanitize everything the wort contacts after boiling.) Keep your fermentation temps at reasonable levels. I generally ferment this beer as close to 72 degrees F as possible. Lower temps tend to emphasize clove flavors. Higher temps bring out the banana. 72 is a nice middle ground, but if you enjoy one flavor more than the other adjust a few degrees in either direction.
If you are a novice to brewing here are some recommendations to make this beer even better:
1. Buy a turkey frier with a big enough pot to boil your whole wort. You often can find an aluminum set-up (aluminum is FINE to brew with, ignore all the folks who tell you otherwise) for less that $50. Make sure your pot is at least 7 gallons so you have room to boil 6 gallons of wort. You want to end up with a final volume of about 5.5 gallons to make up for the .5 you lose in trub (the yeast and protein cake at the bottom of your fermenter.)
2. Buy a copper immersion chiller. Or make one yourself. If you end up boiling the full amount, this will help you cool the beer rapidly. You can normally buy a small one for about $30.
Boiling the whole batch will provide this beverage with more body and help you realize full hop extraction. Furthermore, it will keep your caramelization down, so you will end up with a low SRM (read "yellow beer" vs. "amber".)
I have been an all-grain brewer for about 5 years now. But, if I am feeling lazy, and willing to shell-out the extra cash for extract, this is the only beer style that I am confident will turn out just as well with extract. I have never brewed an all-grain version of this style that improves upon the extract recipe.
Have fun!