Found a coupon in my local "The Negotiator" coupon magazine and it is available online as well. It looks to be a Mother's Day promotion although it lasts for a while past Mother's Day.
The deal is only available at Auburn KK:
Buy a Krispy Kreme Sampler - 1 Dozen Original Glazed Doughnuts and 1 Dozen Assorted Doughnuts for $29.95
Get a FREE 1 Dozen Original Glazed Doughnuts.
i.e. 36 KK doughnuts for $29.95 or approx 83c each.
Saving of $15.95 which is a 35% discount.
Health disclaimer: Please don't eat all 36 doughnuts by yourself. If you do, please refer to https://www.ozbargain.com.au/node/142073
I believe that this is on-going if you have that coupon from negotiator. Noticed this since Christmas (Dec. 2013).