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Christmas tree biscuits

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.

Upgrades[]

Santa Upgrades[]

These Upgrades can be unlocked by upgrading Santa.

Icon Name Unlock condition Base price Description ID
A festive hat A festive hat 25 cookies baked during Christmas season Money 25 Unlocks... something.
"Not a creature was stirring, not even a mouse."
152
A festive wreath Increased merriness Purchasing
"A festive hat" or evolving Santa
Money 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
A festive wreath Improved jolliness Purchasing
"A festive hat" or evolving Santa
Money 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 A lump of coal Purchasing
"A festive hat" or evolving Santa
Money 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 An itchy sweater Purchasing
"A festive hat" or evolving Santa
Money 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 icon Reindeer baking grounds Purchasing
"A festive hat" or evolving Santa
Money 2,525 × 3S Reindeer appear twice as frequently.
"Male reindeer are from Mars; female reindeer are from venison."
157
Reindeer icon Weighted sleighs Purchasing
"A festive hat" or evolving Santa
Money 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
Reindeer icon Ho ho ho-flavored frosting Purchasing
"A festive hat" or evolving Santa
Money 2,525 × 3S Reindeer give twice as much.
Cost scales with Santa level.
"It's time to up the antler."
159
Red Gift Season savings Purchasing
"A festive hat" or evolving Santa
Money 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
Red Gift Toy workshop Purchasing
"A festive hat" or evolving Santa
Money 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 Naughty list Purchasing
"A festive hat" or evolving Santa
Money 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
A festive hat Santa's bottomless bag Purchasing
"A festive hat" or evolving Santa
Money 2,525 × 3S Random drops are 10% more common.
Cost scales with Santa level.
"This is one bottom you can't check out."
163
A festive hat Santa's helpers Purchasing
"A festive hat" or evolving Santa
Money 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
A festive hat Santa's legacy Purchasing
"A festive hat" or evolving Santa
Money 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
A festive hat Santa's milk and cookies Purchasing
"A festive hat" or evolving Santa
Money 2,525 × 3S Milk is 5% more powerful.
Cost scales with Santa level.
"Part of Santa's dreadfully unbalanced diet."
166
Santa's dominion Santa's dominion Reach the final stage of Santa Money 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 Christmas tree biscuits Minimum 20% drop chance from finding a reindeer during Christmas season Money 252.525 billion Cookie production multiplier +2%.
"Whose pine is it anyway?"
143
Snowflake biscuits Snowflake biscuits Minimum 20% drop chance from finding a reindeer during Christmas season Money 252.525 billion Cookie production multiplier +2%.
"Mass-produced to be unique in every way."
144
Snowman biscuits Snowman biscuits Minimum 20% drop chance from finding a reindeer during Christmas season Money 252.525 billion Cookie production multiplier +2%.
"It's frosted. Doubly so."
145
Holly biscuits Holly biscuits Minimum 20% drop chance from finding a reindeer during Christmas season Money 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 Candy cane biscuits Minimum 20% drop chance from finding a reindeer during Christmas season Money 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 Bell biscuits Minimum 20% drop chance from finding a reindeer during Christmas season Money 252.525 billion Cookie production multiplier +2%.
"What do these even have to do with christmas? Who cares, ring them in!"
148
Present biscuits Present biscuits Minimum 20% drop chance from finding a reindeer during Christmas season Money 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
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 Rot
S = # of Shimmerlily
K = # 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:

If you clicked a reindeer with the Mind Over Matter aura active, and Selebrak in the diamond slot, the fail rate will be:

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
Cookies
Unlocked
Probability of Appearance
Formula Base
(s=0.2)
With Mind
over matter
(s=0.36)
With Santa's
bottomless 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
Santa icon Coming to town Reach Santa's 7th form. 109
Santa's dominion All hail Santa Reach Santa's final form. 110
A festive hat Let it snow [note 2] Unlock every Christmas-themed cookie.
Owning this achievement makes Christmas-themed cookies drop more frequently in future playthroughs.
111
Reindeer icon Oh deer Pop 1 reindeer. 112
Reindeer icon Sleigh of hand [note 3] Pop 50 reindeer. 113
Reindeer icon Reindeer sleigher [note 3] Pop 200 reindeer. 114
Reindeer icon Eldeer Pop a reindeer during an elder frenzy. 265
Grandma icon Baby it's old outside Click one of Santa's helper grandmas during Christmas season. 580

Notes[]

  1. 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.
  2. Despite the description, the achievement is awarded only when all the cookies are bought, rather than unlocked.
  3. 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[]

Cookie Clicker game mechanics
Cookies Cookie ClickerClickingBuildings
General AchievementsGolden CookiesMilkSugar LumpsNews TickerOptionsCheating
Cookies per Second (CpS)Cookies per Click (CpC)
Upgrades Upgrades overview
Multipliers: Flavored CookiesKittens
Research: GrandmapocalypseWrath CookiesWrinklersShiny wrinklers
Ascension AscensionHeavenly ChipsChallenge Mode
Seasons Seasons overview
Valentine's DayBusiness DayEasterHalloweenChristmas
Minigames Minigames overview
GardenStock MarketPantheonGrimoire
Further reading Gameplay
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