The chain blamed poor-quality buns and were expected to reopen Tuesday after a new shipment of buns were due to be delivered.
The stores remained closed on Tuesday, however, but they are expected to reopen on Wednesday, according to an In-N-Out spokesperson.
Texas fans of In-N-Out Burger will have to wait a little bit to get their burger fix.
All of the In-N-Out restaurants in Texas were closed on Monday and Tuesday after the company identified an undisclosed issue with the buns they had on hand.
"At In-N-Out Burgers, we have always served the highest quality food with no compromise. We recently discovered that our buns in Texas do not meet the quality standards that we demand," Executive Vice President Bob Lang, Jr. said in a statement to Business Insider.
The company did not specify what the issue with the buns was. The stores had been expected to reopen on Tuesday but remained closed.
"We decided to close all of our Texas stores until we are confident that we can serve our normal high quality bun," Lang said, adding that new, fresh buns are on the way and that the restaurants are expected to reopen on Wednesday.
Lang apologized for the closures and reiterated that the defective buns were never a food safety concern for the restaurants.
In-N-Out currently has 37 restaurants in the state of Texas, which is notably the easternmost state where it operates. All of the restaurants are serviced by the company's distribution center in Dallas. The company is famous for having its stores in only six western states due to what it says is a focus on quality control as well as a refusal to franchise stores.
It has plans to open locations in a seventh state — Colorado — in the coming years.
SEE ALSO: In-N-Out is expanding to Colorado