This is from a previous thread
https://www.homebrewersassociation.org/forum/index.php?topic=25919.msg334269#msg334269If you are going Hefeweizen you are missing a decoction. IMO (*edit - and not only my opinion) you have to have it for your hefe to have the right body. I am not sure why the 20min step to 160F.
My mash schedule for wheat beers looks like this:
110F 10 mins
133F 30 mins
pull 1/3 for decoction - 10min rest at 150F then boil 15mins meet at the end of the 30 min rest above
152F for 30 mins
Mash Out
Here is a good article on Hefeweizen
http://byo.com/stories/issue/item/2265-german-hefeweizen-style-profileBetween Gulbransen and Brynildson, you are getting good advice on wheat beers.
Clip from article
A common hefeweizen recipe would be 50 to 70% wheat malt, 30 to 50% Pilsner malt, and 0 to 5% light colored dextrin malt. That is all you need to brew a great hefeweizen. While you might consider adding some other malts to develop bready flavors or body, I learned it is much better to focus on your process. Keep in mind brewers craft the world’s best examples from this simple recipe.
Historically, most weizen-type beers would have been decoction mashed and Gulbransen is a staunch proponent of decoction for hefeweizen. “I like decoction because it lends a full, toasty maltiness that seems absent in a single infusion mash,” Gulbransen said. “Since today’s malts are so highly modified, I prefer to start my mash at 130 to 134 °F (54 to 57 °C) to avoid a protein rest. I then pull a single decoction, boiling it for 10 to 15 minutes, before I return it to the mash and raise the entire mash for a rest at 152 °F (67 °C).” I can attest to the quality of Gulbransen’s hefeweizen; his methods do work well.
Matthew Brynildson of Firestone Walker Brewing Company in Paso Robles, California has won many awards. Recently they won an amazing six medals at the 2010 World Beer Cup. They also won their third Champion Brewery award and took a gold medal with their hefeweizen. I asked Brynildson what he felt was key to making a world-class hefeweizen. Brynildson favors a step mash and considers a ferulic acid rest very important to the proper development of fermentation flavors for this style.
“Mashing at 110 °F (43 °C) aids in the hydrolysis of ferulic acid. The yeast use ferulic acid to produce 4-vinyl guaiacol, which is the phenolic (clove-like) flavor compound that is so important in this style,” he said.