Krumblor as he appears during a Dragonflight or Dragon Harvest.

Krumblor the cookie dragon is a widget that was added in v1.9 of Cookie Clicker. By sacrificing cookies and buildings to Krumblor, the player will unlock selectable auras which provide various benefits in the game. An aura can be selected by clicking on the dragon. Switching auras costs one of the highest tier building owned.

To unlock Krumblor, the player must purchase the Heavenly Upgrade 'How to bake your dragon', which in turn unlocks the upgrade 'A crumbly egg' in all subsequent playthroughs.

Dragon stages and aurasEdit

Appearance Title Available action/description Sacrifice
Dragon egg Chip it 1 million cookies
2 million cookies
4 million cookies
Shivering dragon egg Hatch it 8 million cookies
Krumblor, cookie hatchling Train Breath of Milk
Aura: kittens are 5% more effective
16 million cookies
Train Dragon Cursor
Aura: clicking is 5% more effective
100 cursors
Train Elder Battalion
Aura: grandmas gain +1% CpS for every non-grandma building
100 grandmas[note 1]
Train Reaper of Fields
Aura: golden cookies may trigger a Dragon Harvest
100 farms
Krumblor, cookie dragon Train Earth Shatterer
Aura: buildings sell back for 50% instead of 25%
100 mines
Train Master of the Armory
Aura: all upgrades are 2% cheaper
100 factories
Train Fierce Hoarder
Aura: all buildings are 2% cheaper
100 banks
Train Dragon God
Aura: prestige CpS bonus +5%
100 temples
Train Arcane Aura
Aura: golden cookies appear 5% more often
100 wizard towers
Train Dragonflight
Aura: golden cookies may trigger a Dragonflight
100 shipments
Train Ancestral Metamorphosis
Aura: golden cookies give 10% more cookies
100 alchemy labs
Train Unholy Dominion
Aura: wrath cookies give 10% more cookies
100 portals
Train Epoch Manipulator
Aura: golden cookie effects last 5% longer
100 time machines
Train Mind Over Matter
Aura: +25% random drops[note 2]
100 antimatter condensers
Train Radiant Appetite
Aura: all cookie production multiplied by 2
100 prisms
Train Dragon's Fortune
Aura: +123% CpS per golden cookie on-screen, multiplicative[note 3]
100 chancemakers
Train Dragon's Curve
Aura: sugar lumps grow 5% faster, 50% weirder[note 4]
Aura of fractal engine
100 fractal engines
Krumblor, cookie dragon Bake dragon cookie

[note 5]

50 of every building
Train secondary aura
Lets you have two dragon auras simultaneously
200 of every building
Your dragon is fully trained

This image shows the multiplier for the Breath of Milk dragon aura, based on the milk percentage and which kitten upgrades are active. In each group of 4 lines, grouped by color, the bottom line is the base multiplier, the next line is the multiplier with Santa's milk and cookies, the next line is the multiplier with Kitten angels, and the top line is the multiplier with both. The lines for each kitten upgrade assume that all previous kitten upgrades are active as well.

The overall effect of Dragon Cursor depends on how much the player clicks the Big Cookie, but as a rough estimate, with all upgrades, they will make approximately 1% more cookies at 2 clicks per second, 2% at 4 clicks per second, 3% at 10 clicks per second, 4% at 25 clicks per second, 4.5% at 55 clicks per second, and 4.9% at 300 clicks per second.

With optimal building distribution, Elder Battalion will give an overall production increase of about 1%. It can increase total production in the early game by a 5 fold after the Grandmapocalypse. This will become less significant the further the player progresses in the game. It can, however, be used to obtain the achievements "Gushing grannies" (bake 10 quintillion cookies with grandmas), "Panic at the bingo" (bake 10 sextillion cookies with grandmas), and "Frantiquilities" (bake 10 septillion cookies with grandmas) quicker, due to having a larger general CpS buff to grandma CpS than Radiant Appetite, Dragon's Fortune, and Dragon Harvest.

The overall effect of Reaper of Fields has not yet been calculated, but will eventually be included in Expected Long Term Cookie Production.


Earth Shatterer should be used before selling all buildings, using the Chocolate egg, and ascending.

The overall effect of Dragon God scales up to 5% with Prestige, as shown in this image on a log scale.

The overall effect of Arcane Aura has not yet been calculated, but will eventually be included in Expected Long Term Cookie Production. A rough estimate is about 5% for active play.

Detailed calculations for Dragonflight will eventually be included in Expected Long Term Cookie Production. A rough estimate is a 150% increase in click-based production, which translates roughly to a 20% increase at 1 click per second, 35% at 2 clicks per second, 50% at 3 clicks per second, 60% at 4 clicks per second, 80% at 7 clicks per second, 100% at 13 clicks per second, and 120% at 25 clicks per second.

Ancestral Metamorphosis and Unholy Dominion only affect Lucky and Chain cookies, which means their effects reduce fairly quickly with an active playstyle. The benefit of Ancestral Metamorphosis drops from about 8% with an idle playstyle, to 5% at 4 clicks per second, to 3% at 10 clicks per second, to 2% at 20 clicks per second, to 1% at 45 clicks per second.

The overall effect of Epoch Manipulator has not yet been calculated, but will eventually be included in Expected Long Term Cookie Production. A rough estimate is about 5%.

Radiant Appetite has a flat 100% bonus to all production.

Dragon's Fortune can grant a multiplier of over 2 with one golden cookie on the screen. This can be coupled well with Force The Hand Of Fate. It is however risky to have this, due to golden cookies not being truly "permanent", in fact the bonuses can last not more than two or three times a Dragonflight, giving much less of a multiplier. It is still possible to force many golden cookies, find a Dragonflight cookie, and have a Dragonflight twice or even thrice as powerful as a regular one.


  1. This will give the achievement 'Just wrong'.
  2. This affects garden upgrade drops, eggs during easter, and flavored seasonal cookies from Halloween and Christmas.
  3. This does not include the golden cookies created by a cookie storm.
  4. In the selection menu, "50% weirder" is replaced with "sugar lumps are twice as likely to be unusual".
  5. Gives dragon cookie upgrade (multiplier +5%).


  • The upgrade "How to bake your dragon" is a reference to the book (made into a movie) "How to Train your Dragon" by Cressida Cowell.
  • The aura "Dragon's Curve" is a reference to the family of fractals of the same name.
  • Krumblor will always appear below Santa.
  • Krumblor is also in the game AdventureQuest Dragons, which was made by Orteil in conjunction with Artix Entertainment.
Interactive Objects
Big Cookie
Golden Cookie
Wrath Cookie
Wrinkler - 1
Shiny wrinkler
Category:Interactive Objects

Start a Discussion Discussions about Krumblor

  • How do I interact with the egg?

    2 messages
    • Playing on an iPad using Safari and clicking on the egg does nothing, even though I have more cookies than I need to sacrifice.
    • I’m having the same problem. Jonas?
  • Bake dragon cookie (delicious)

    2 messages
    • To tell you the truth, the only reason I got on here was because I was worried about what would happen if I baked a dragon cookie.
    • no idea mate i came here for the same reason