There's also a new Caramel Mocha and the Caramel Hot Chocolate.
Best of all, it's part of several Greggs deals, including the new 3-part Big Deal. Choose a main from any hot or cold sandwich, salad, pasta, or chicken goujons, add any drink, and select from a range including wedges, fruit pot, crisps, yoghurt, an egg pot- all for £5.
For a limited time only customers can choose to swap their side to either a Sausage Roll or a Vegan Sausage Roll.
New users of the Greggs App receive a free iced or hot drink of their choice upon registration, as well as a free sweet treat to celebrate their birthday each year.
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New sweet treat with autumnal flavours include a toffee fudge muffin and pumpkin spice doughnut.
Kicking off the savoury September menu update is the new chicken fajita bake and new firecracker chicken range, available made-to-order at the counter in selected shops nationwide.
There's a new hot firecracker pizza, topped with spicy chicken, peppers, and a fiery tomato and chipotle sauce on a focaccia style base. It's available by the slice and also in various sized share boxes.
As part of its September menu updates, Greggs is upgrading its toastie range with a new cheese and onion chutney, and the tangy BBQ chicken toastie, served on toasted white bread made with sourdough, and topped with béchamel sauce and grated mixed cheese.
The new arrivals will be available in shops nationwide from Thursday September 4.
All of the new menu items are available via Click+Collect on the Greggs App.