Papa John's is finally launching its cheese stuffed crust across the whole of the US. With a promo code, it's $12 for a large single-topping pizza.

• Papa John's cheese-stuffed crust is finally hitting stores nationwide on December 28.
• The Epic Stuffed Crust, which uses Papa John's original dough filled with cheese, costs $12 for a large one-topping pizza with the promo code "STUFFED."
• This is only the second time the chain has introduced a variant on its original crust in 35 years.
• Papa John's first rolled out the crust in October in select states including in Ohio, Kentucky, and Texas, where it cost $3 extra to upgrade any large pizza to an Epic Stuffed Crust.

Papa John's cheese-stuffed crust is finally hitting stores nationwide.

The Epic Stuffed Crust is being launched nationwide on December 28, but Papa Rewards members can try it early from select locations from December 21.

It costs $12 for a large one-topping pizza with the promo code "STUFFED."

This is only the second time Papa John's has introduced a variant on its original crust in the chain's 35 years, after launching its garlic parmesan crust in 2019, the company said.

Each stuffed-crust pizza uses the company's original six-ingredient dough, hand-stuffed with cheese.

"As we continue to develop new craveable menu offerings, we're always inspired by our fans," Tom Smith, Papa John's director of culinary innovation, said in a press release. "Stuffed crust lovers are passionate pizza fans, and it is something our fans continue to ask for."

Papa John's first rolled out the crust in October in select states including in Ohio, Kentucky, and Texas, where it cost $3 extra to upgrade any large pizza to an Epic Stuffed Crust.

Read more: Papa John's says it expects the pandemic-induced spike in pizza sales to continue 'for the foreseeable future'

The new crust contrasts with a pizza debuted by the fast food chain earlier this year - which had no crust at all.

In June, Shaquille O'Neal and Papa John's released a "Shaq-a-Roni" pizza that Business Insider's Irene Jiang described as "basically a giant pepperoni pizza without a crust." The pizza is topped with pepperoni slices right to the edges, and features what Papa John's describes as its "largest slice size to date."

Pizza and take-out sales are booming during the pandemic, and Papa John's is no exception, with revenues up 17.1% year-on-year in the third quarter.