"We have put a small number of rises across products as of yesterday, we've worked hard to mitigate that," Chief Executive Roisin Currie told Reuters.
She said a Greggs sausage roll was 1.05 pound ($1.20) at the start of the year, moved to 1.10 pound in May and is now 1.15 pound.
Price rises on other products were 5 pence to 10 pence.
Currie said she hoped it would be the final round of price increases this year but could not guarantee it.
She was speaking after Greggs reported strong third quarter trading, sending its shares up 7.9%.
($1 = 0.8770 pounds)
(Reporting by James Davey, Editing by Kylie MacLellan)