|Prism icon in the shop|
|In-Game Description||Converts light itself into cookies.|
The Prism is a building added in v1.041. It is currently the most expensive building in the game. It has a base price of 75 billion (75,000,000,000) cookies, and its max CPS is 352,000,000 when fully upgraded. It currently has six upgrades, the most expensive of which costs 600 quintillion cookies. At 15 Prisms, you unlock the rainbow Grandma upgrade, which makes Grandmas twice as efficient.
The cost of buying 100 prisms is just over 587.1 quadrillion cookies. This jumps to 636.2 quintillion for 150 of them. To reach 200 of them, you need a massive 689.5 sextillion cookies. The most Prisms you can have (without cheating) is 4901, after which the price gets too high for the computer to process, and it says "Infinite". Even if you have infinity cookies (also caused by having too many cookies for the computer to process), you will still not be able to buy it (unless you cheat).
- The caption below the first upgrade, Gem Polish, is a reference to the 1980's cartoon "Jem and the Holograms", where the line "Truly, Truly Outrageous" is sung during the theme song.
- The graphics of the prism may be a reference to Pink Floyd's "The Dark Side of the Moon" album cover.