I've been having a look through the cookies to see what changes there have been this year, this is what I've found: (compared with info on ddowiki)
Black abbot: spawn screen CL15 - previously stoneskin
Green abishai: protection from elements CL8 - previously neutralise poison
Queen Lailat: slow CL15 - previously burning blood
Succubus: charm monster CL10 - previously mass charm monster
Daanvi: silence creature CL10 - previously summon defender of law
Kythri: colour spray CL10 - previously chaos hammer
Lammania: tenacious pack CL12 - previously lesser vigor
Shavarath: armour of speed CL10 - previously aid
no spaces have been added to the cookie jars for new ones - in previous years existing jars were updated to add the storage space for additional types & it's still showing 41 slots, though incidentally the store description still says they have 30 slots. I'm assuming this is an oversight & am hoping that there'll be some more new cookies added this year that we'll see once we start turning coins in next week - if there are, it'd make sense to have them be a handful of the new alchemist spells to act as a little advance preview before we see the class properly.