Christmas Season is a seasonal event in Cookie Clicker that was added on the 1.04 update. The event was active during versions 1.04 - 1.0403 without a way to turn it off. Since version 1.0466, Christmas season starts automatically and lasts from the 15th to the 31st of December. Since the introduction of the Season switcher in version 1.041, Christmas Season can also be activated by purchasing the Festive biscuit, which will launch it for 24 hours. Like all season switcher upgrades, it is repeatable, but will get more expensive every time you buy it, like buildings, and will also cancel any other seasonal event that is active at this time.
Christmas season brings two major features, reindeer and Santa. Reindeer will occasionally appear and hop across the screen. Clicking them will give 1 minute's worth of cookies and has a chance to unlock one of the Christmas-themed flavored cookie upgrades (see below). Santa is a widget that appears in the bottom-left corner of the screen after purchasing the first upgrade available during the season, A festive hat. Upgrading Santa will unlock specific upgrades which provide various effects.
Aesthetic changes include snowflakes alongside the falling cookies, wrinklers having red and white stripes on their bodies and Santa hats on their heads, and elf grandmas appearing alongside the other grandmas.
Contents
1 Upgrades
1.1 Santa Upgrades
1.2 Reindeer Cookies
2 Achievements
3 Notes
4 Trivia
5 Gallery
Upgrades[]
Santa Upgrades[]
These Upgrades can be unlocked by upgrading Santa.
Icon
Name
Unlock condition
Base price
Description
ID
A festive hat
25 cookies baked during Christmas season
25
Unlocks... something."Not a creature was stirring, not even a mouse."
152
Increased merriness
Purchasing"A festive hat" or evolving Santa
2,525 × 3S
Cookie production multiplier +15%.Cost scales with Santa level."It turns out that the key to increased merriness, strangely enough, happens to be a good campfire and some s'mores.You know what they say, after all; the s'more, the merrier."
153
Improved jolliness
Purchasing"A festive hat" or evolving Santa
2,525 × 3S
Cookie production multiplier +15%.Cost scales with Santa level."A nice wobbly belly goes a long way.You jolly?"
154
A lump of coal
Purchasing"A festive hat" or evolving Santa
2,525 × 3S
Cookie production multiplier +1%.Cost scales with Santa level."Some of the world's worst stocking stuffing.I guess you could try starting your own little industrial revolution, or something?..."
155
An itchy sweater
Purchasing"A festive hat" or evolving Santa
2,525 × 3S
Cookie production multiplier +1%.Cost scales with Santa level."You don't know what's worse : the embarrassingly quaint "elf on reindeer" motif, or the fact that wearing it makes you feel like you're wrapped in a dead sasquatch.
156
Reindeer baking grounds
Purchasing"A festive hat" or evolving Santa
2,525 × 3S
Reindeer appear twice as frequently."Male reindeer are from Mars; female reindeer are from venison."
157
Weighted sleighs
Purchasing"A festive hat" or evolving Santa
2,525 × 3S
Reindeer are twice as slow.Cost scales with Santa level."Hope it was worth the weight.(Something something forced into cervidude)"
158
Ho ho ho-flavored frosting
Purchasing"A festive hat" or evolving Santa
2,525 × 3S
Reindeer give twice as much.Cost scales with Santa level."It's time to up the antler."
159
Season savings
Purchasing"A festive hat" or evolving Santa
2,525 × 3S
All buildings are 1% cheaper.Cost scales with Santa level."By Santa's beard, what savings!But who will save us?"
160
Toy workshop
Purchasing"A festive hat" or evolving Santa
2,525 × 3S
All upgrades are 5% cheaper. [note 1]Cost scales with Santa level."Watch yours-elf around elvesdroppers who might steal our production secrets.Or elven worse!"
161
Naughty list
Purchasing"A festive hat" or evolving Santa
2,525 × 3S
Grandmas are twice as productive.Cost scales with Santa level."This list contains every unholy deed perpetuated by grandmakind.He won't be checking this one twice.Once. Once is enough."
162
Santa's bottomless bag
Purchasing"A festive hat" or evolving Santa
2,525 × 3S
Random drops are 10% more common.Cost scales with Santa level."This is one bottom you can't check out."
163
Santa's helpers
Purchasing"A festive hat" or evolving Santa
2,525 × 3S
Clicking is 10% more powerful.Cost scales with Santa level."Some choose to help hamburger; some choose to help you.To each their own, I guess."
164
Santa's legacy
Purchasing"A festive hat" or evolving Santa
2,525 × 3S
Cookie production multiplier +3% per Santa's levels.Cost scales with Santa level."In the north pole, you gotta get the elves first. Then when you get the elves, you start making the toys. Then when you get the toys... then you get the cookies."
165
Santa's milk and cookies
Purchasing"A festive hat" or evolving Santa
2,525 × 3S
Milk is 5% more powerful.Cost scales with Santa level."Part of Santa's dreadfully unbalanced diet."
166
Santa's dominion
Reach the final stage of Santa
2.525 quadrillion
Cookie production multiplier +20%.All buildings are 1% cheaper.All upgrades are 2% cheaper. [note 1]"My name is Claus, king of kings;Look on my toys, ye Mighty, and despair!"
168
Owning all of these upgrades provides a total of:
+ (62*1.03S) overall CpS
+100% Reindeer spawns
+100% Reindeer drops
-50% Reindeer speed
+10% random drops
+100% Grandma CpS
+10% cookies per click
+5% Kitten efficiency
-2% building cost
-7% upgrade cost
Where S is the current level of Santa.
Reindeer Cookies[]
These 7 flavored cookie upgrades may drop from reindeer during the Christmas season.
Icon
Name
Unlock condition
Base price
Description
ID
Christmas tree biscuits
Minimum 20% drop chance from finding a reindeer during Christmas season
252.525 billion
Cookie production multiplier +2%."Whose pine is it anyway?"
143
Snowflake biscuits
Minimum 20% drop chance from finding a reindeer during Christmas season
252.525 billion
Cookie production multiplier +2%."Mass-produced to be unique in every way."
144
Snowman biscuits
Minimum 20% drop chance from finding a reindeer during Christmas season
252.525 billion
Cookie production multiplier +2%."It's frosted. Doubly so."
145
Holly biscuits
Minimum 20% drop chance from finding a reindeer during Christmas season
252.525 billion
Cookie production multiplier +2%."You don't smooch under these ones. That would be the mistletoe (which, botanically, is a smellier variant of the mistlefinger)."
146
Candy cane biscuits
Minimum 20% drop chance from finding a reindeer during Christmas season
252.525 billion
Cookie production multiplier +2%."It's two treats in one!(Further inspection reveals the frosting does not actually taste like peppermint, but like mundane sugary frosting.)"
147
Bell biscuits
Minimum 20% drop chance from finding a reindeer during Christmas season
252.525 billion
Cookie production multiplier +2%."What do these even have to do with christmas? Who cares, ring them in!"
148
Present biscuits
Minimum 20% drop chance from finding a reindeer during Christmas season
252.525 billion
Cookie production multiplier +2%."The prequel to future biscuits. Watch out!"
149
The current drop chance is 1-f, where f is the fail rate. The base fail rate is 0.8, or 0.6 if the achievement "Let it snow" is unlocked. There are several factors which can further reduce the fail rate.
Modifier
Factor
Green yeast digestives
1/1.03=0.970874
Dragon teddy bear
1/1.03=0.970874
Santa's Bottomless Bag
1/1.1=0.909091
Let it snow
0.75 (relative)
Starsnow
0.95
Selebrak, Spirit of Festivities
0.9/0.95/0.97 (Diamond/Ruby/Jade)
Mind Over Matter, Reality Bending, both
1/(1.25, 1.025, 1.275) = 0.8, 0.9756, 0.7843
Cosmic Beginner's Luck
0.2
Garden plants (mature, dirt)
1/(1+0.01G+0.01S+0.03K)
G = # of Green RotS = # of ShimmerlilyK = # of Keenmoss
For example, if you clicked a reindeer with the Let it snow achievement and the Heavenly upgrade Starsnow, then the fail rate will be:
f
=
0.6
∗
0.95
=
0.57
{\displaystyle f=0.6*0.95=0.57}
If you clicked a reindeer with the Mind Over Matter aura active, and Selebrak in the diamond slot, the fail rate will be:
f
=
0.8
/
1.25
∗
0.9
=
0.576
{\displaystyle f=0.8/1.25*0.9=0.576}
After figuring out the fail rate (f), calculate successful rate (s = 1-f) and use following table to find out the probabilities.
Probabilities for Christmas Cookies
CookiesUnlocked
Probability of Appearance
Formula
Base(s=0.2)
With Mindover matter(s=0.36)
With Santa'sbottomless bag(s=0.272727)
All modifiers,No plants(s=0.929)
0
s*7/7
20%
1/5
36%
1/2.8
27.3%
1/3.7
92.9%
1
s*6/7
17.1%
1/5.8
30.8%
1/3.2
23.3%
1/4.3
79.6%
2
s*5/7
14.3%
1/7
25.7%
1/3.9
19.5%
1/5.1
66.4%
3
s*4/7
11.4%
1/8.8
20.6%
1/4.9
15.6%
1/6.4
53.1%
4
s*3/7
8.57%
1/12
15.4%
1/6.5
11.7%
1/8.6
39.8%
5
s*2/7
5.71%
1/18
10.3%
1/9.7
7.79%
1/13
26.5%
6
s*1/7
2.86%
1/35
5.14%
1/19
3.90%
1/26
13.3%
Expected value for Reindeer clicked to unlock all
363/20s
91
50
67
20
Achievements[]
Icon
Name
Description
ID
Coming to town
Reach Santa's 7th form.
109
All hail Santa
Reach Santa's final form.
110
Let it snow [note 2]
Unlock every Christmas-themed cookie.Owning this achievement makes Christmas-themed cookies drop more frequently in future playthroughs.
111
Oh deer
Pop 1 reindeer.
112
Sleigh of hand [note 3]
Pop 50 reindeer.
113
Reindeer sleigher [note 3]
Pop 200 reindeer.
114
Eldeer
Pop a reindeer during an elder frenzy.
265
Baby it's old outside
Click one of Santa's helper grandmas during Christmas season.
580
Notes[]
↑ 1.0 1.1 Upgrades which lower the cost of upgrades stack multiplicatively, not additively. That is, if you have 3 of them which reduce the cost of upgrades by 5%, 2% and 1% then the final cost of an upgrade is (original cost) * 0.95 * 0.98 * 0.99.
↑ Despite the description, the achievement is awarded only when all the cookies are bought, rather than unlocked.
↑ 3.0 3.1 Unlike most "number of actions" achievements, the Wrinkler and Reindeer achievements are counted in a single game, not all time: Ascending will reset the counter.
Trivia[]
The Christmas Season was first confirmed on Orteil's Tumblr.
Christmas is the only season that does not change the appearance of wrath cookies.
The description for the "A festive hat" upgrade references the famous Clement Clark Moore poem "A Visit from St Nicholas," aka "'Twas the Night Before Christmas."
The description for the Ho-ho-ho flavored frosting upgrade is a pun on the cliche "to up the ante."
The description for the Weighted Sleighs upgrade contains a pun on Cervidae, the scientific name for the deer family.
The description for the Santa's helpers upgrade is a reference to the convenience food Hamburger Helper.
The description for the Santa's Dominion upgrade is a play on Percy Shelley's poem 'Ozymandias.'
The description for the Final Claus form of Santa is a pun on Final Clause.
The description for the Christmas tree biscuit upgrade is a pun on the TV show "Whose Line Is It Anyway?"
Shiny wrinklers do not have a striped pattern.
Gallery[]
The elf grandmas that appear during Christmas season. The appearance of wrinklers during Christmas season. Winklers during the Christmas season.
Cookie Clicker game mechanics This box: view • talk • edit
Cookies
Cookie Clicker • Clicking • Buildings
General
Achievements • Golden Cookies • Milk • Sugar Lumps • News Ticker • Options • CheatingCookies per Second (CpS) • Cookies per Click (CpC)
Upgrades
Upgrades overviewMultipliers: Flavored Cookies • KittensResearch: Grandmapocalypse • Wrath Cookies • Wrinklers • Shiny wrinklers
Ascension
Ascension • Heavenly Chips • Challenge Mode
Seasons
Seasons overviewValentine's Day • Business Day • Easter • Halloween • Christmas
Minigames
Minigames overviewGarden • Stock Market • Pantheon • Grimoire
Further reading
Gameplay
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