Greggs also announced it will open 80 new shops, creating more than 700 extra jobs in 2011.
Greggs' marketing activity over the period included an online Christmas song-writing competition, which launched in December.
Greggs, today, said: "The last-minute rush by many shoppers, combined with a more favourable trading pattern where Christmas day fell on Saturday, drove strong sales."
The baker said that during the Christmas trading period coffee sales jumped 26% while sweet mince pie sales lifted 19%.
In the Christmas week ending 25 December Greggs said total sales increased 19.6% on the year.
Ken McMeikan, chief executive of Greggs, said: "I am very pleased with both our record Christmas week sales and our new shop opening programme, particularly considering how difficult the trading conditions on high streets were in the run up to Christmas.
"Despite the impact of the snow, we anticipate reporting full year results in line with expectations when we make our preliminary results announcements on 16 March 2011.
"The consumer environment in the year ahead is likely to continue to be challenging but we remain well positioned to make further progress in 2011 and expect to open around 80 new shops, creating more than 700 new jobs."