Slideshow: How This 90-Year-Old Factory Makes 2.5 Million Pounds of Passover Matzo

Streit's: Since 1925
Streit's: Since 1925
Aron Streit, Inc. was founded in 1916. In 1925, Streit and his son relocated from their original location on Pitt Street to 148-154 Rivington Street. Despite briefly putting the property on the market in 2007, Streit's still produces all of their matzo on the Lower East Side.
Aron Streit
Aron Streit
Aron Streit, an Austrian-Jewish immigrant founded Streit's in 1916. This portrait hangs in the office of his great-grandson, Alan Adler, who currently runs the company with two of his cousins.
Timer
Timer
Passover matzo must be mixed, shaped, and baked entirely within 18 minutes. Though there are no actual leavening agents in the dough, it starts hardening and cracking on the edges at the 18 minute mark, which rabbinical consensus considers a sign of leavening.
Mixers
Mixers
Streit's uses two industrial Hobart mixers.
Mixing the dough
Mixing the dough
Water is added to each batch of flour as it's mixed into dough.
Employees
Employees
Several Streit's employees look on as the matzo dough is mixed. Rabbi Mayer Kirshner (far right) oversees Streit's kosher operations, ensuring all matzo produced is kosher for passover and coordinating with numerous Kosher certifying agencies.

For the matzo to be kosher, the dough can only be handled by Sabbath-observing Jews. The finished baked product can be handled by anyone.

Cleaning
Cleaning
The bucket is cleaned between batches to make sure no aged dough contaminates a new batch.
Downstairs
Downstairs
The big ball of dough is formed into rough sheets.
Flattening
Flattening
Then they're flattened and thinned out.
Cutting
Cutting
The matzo is then scored so it can be broken into sheets after baking.
Into the oven
Into the oven
The Oven
The Oven
The right wall in this picture covers the conveyer belt-driven oven, which runs down the entire length of this hallway.
Counting the matzo
Counting the matzo
The matzo sheets are counted into stacks of 15, enough for a one-pound box of matzo.
Breaking the matzo
Breaking the matzo
The one-pound stacks are loaded onto cooling racks.
Mobile cooling racks
Mobile cooling racks
The cooling racks travel upstairs...
...into the packaging room...
...into the packaging room...
...and onto the packaging machine
...and onto the packaging machine
The matzos are loaded onto the conveyor belt manually.
Non-Passover packaging machine
Non-Passover packaging machine
For non-Passover matzos, Streit's uses this newer British-made machine. It isn't used during Passover production.
Crooked matzo
Crooked matzo
If you've ever encountered a broken matzo, it's probably because this happened.
Down to labeling...
Down to labeling...
Label spools
Label spools
Folding the labels
Folding the labels
Onto the conveyor belt...
Onto the conveyor belt...
...and into the boxing room
...and into the boxing room
...placed in shipping boxes...
...placed in shipping boxes...
...and sealed
...and sealed
Matzo waiting to be shipped
Matzo waiting to be shipped
Streit's storefront
Streit's storefront
Adjacent to the factory is a small storefront, where Streit's sells matzo and various kosher goods. The day we were there, no one was behind the counter. While the storefront once was a major factor in Streit's sales, most of their production today is for wholesale clients. However, the store showcases many of Streit's products, as well as the company's history. Pictured are portraits of Aron Streit and his wife, Nettie, as well as various community honors from over the years.
Place Passover Orders Here!
Place Passover Orders Here!
Matzo of yesteryear
Matzo of yesteryear
An undated photo of past Streit's matzo production.
Non-Passover matzos
Non-Passover matzos
Whole wheat, onion poppy moonstrips, salt & pepper, flour & water, and Mediterranean (with sun-dried tomatoes, garlic, basil, and olive oil) matzos.
Kosher for Passover Spelt Matzo
Kosher for Passover Spelt Matzo
Matzo with spelt flour, kosher for Passover.
Matzo Shmurah
Matzo Shmurah
While most matzo is monitored for kosher quality starting at the mixing process, wheat from matzo shmurah is monitored from harvesting to ensure no contact with water, and by extension, preventing any potential for premature leavening.

On the left is non-Passover matzo, labeled for breast cancer awareness.