The Cookie Castle serves as a symbol of the Kingdom's progress. Only by upgrading the Cookie Castle can players unlock certain features and Buildings for their Kingdom. It is unlocked once a player clears Stage 1-13 in World Exploration.
Cookie Castle Levels
Upgrading the Cookie Castle unlocks Material Buildings and Goods Buildings, and also uncaps leveling restrictions that Cookie Houses and certain Landmarks have. Later Cookie Castle levels also expand the amount of territory that can be expanded into. The highest current achievable Cookie Castle Level is 15.
Before being able to upgrade the Cookie Castle to its next Level, the player must accomplish certain prerequisite Missions. After leveling the Cookie Castle up, the amount of time required to upgrade it to the next level can be seen.
| Level | Materials | Coin Cost | Build Time | Prerequisite Missions | Rewards |
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| 0 → 1 | N/A | N/A | N/A | N/A |
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| 1 → 2 |    |
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| 2 → 3 |   |
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| 3 → 4 |    |
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| 4 → 5 | |
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| 5 → 6 | |
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| 6 → 7 | |
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| 7 → 8 | |
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| 8 → 9 | |
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| 9 → 10 | |
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| 10 → 11 | |
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| 11 → 12 | |
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| 12 → 13 | |
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| 13 → 14 | |
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| 14 → 15 | |
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Kingdom Designs
Upon reaching Castle Level 6, the player unlocks Kingdom Design, which allows them to change the designs of the Cookie Castle, the Arena Statue, the Background, and access to the Kingdom Music Hall.
The Castle's default appearance will always be the Cookie Castle Design. Castle Designs affect the appearance of the Castle itself along with its front yard surrounding the Fountain of Abundance, outer wall, spires, and gate. They offer no additional benefits to the player other than changing the Castle's appearance for visual effect. Pairing certain castle and fountain designs will trigger an extra animated effect on the castle.
Castle Designs
| Design | Unlock Requirement | Cost | Description |
|---|---|---|---|
Cookie Castle |
Default | - | A symbol of this kingdom's might, this castle lives once again thanks to the Cookies! |
 Glorious Vanilla Castle |
Castle Lv. 7 | |
This magnificent castle decorated with colorful stained candy glass reminds you of the pinnacle of the Vanilla Kingdom. May its blue banners always fly proudly in the wind! |
 Vibrant Hollyberry Castle |
Clear 12-30 | |
A vibrant castle with a dome covered in ornate fruit and flower patterns. Its majestic halls are always full of guests attending the royal ball, bustling with eloquent dances and exciting music. If you're lucky, you might be able to get a glance of its gallant Royal Guard parades. |
 Solemn Dark Cacao Castle |
Clear Dark Mode 13-10 | |
There it stands, on the very edge of the Giant Icing Ridge, rising tall above the endless birch forests. Only the yells of sparring warriors and the clang of crossing blades ever break the silence under the 100% cacao roof tiles of the solemn Black Citadel. |
Bonus effect with: Fountain of Black & White 
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 Magical Disney Cookie Castle |
Collect 20 Memory Stamps from the Disney Cookie World event | A mystical, magical castle, made through the power of wishes from the Cookies of the Cookie Kingdom. Within the milk chocolate walls, incredible sculptures and delicate designs made of custard cream, blueberry ice cream, and everything you could imagine, fill the castle grounds and hallways. Inside, the Cookie of your dreams await you inside, sitting atop a white horse! Tonight begins a party that you will never forget! | |
 Cookie Brixcastle |
Complete all 5 missions from the BRIXITY Launch Event Complete Mission 2 in BRIXITY Multiplayer Mode Update Event |
Ah, the Cookie Castle from the future where abundant jam and honey flow in blocks. Built from carefully stacked biscuit, strawberry, choco and green tea-flavored Brix, this castle, with its blocky wall and towers, is a symbol of the all conquering creativity of the Sugar Gnomes and Brixmasters! Let's join the amazed Cookies and celebrate! | |
 Dazzling Golden Cheese Castle |
Clear Dark Mode 17-1 | |
A discovery of the century! At last, the fabled castle of gold, also known as the Mirage of the Parmesan Desert, has been found. Fashioned of the purest unalloyed gold, the magnificent edifice is a testament to unparalleled opulence and splendor. |
Bonus effect with: Fountain of Eternity 
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 Familiar-looking Abandoned Castle |
Complete all missions in Witch's Castle Launch Collab Complete Mission 3 in Witch's Castle Special Update Event |
This dark, eerie castle with its crooked spires shrouded in shadows inspires dread in some but seems almost... nostalgic to other Cookies! Looking at it, you cannot help but wonder about the secrets it keeps deep within. | |
Bonus effect with: Ancient Violet Fountain 
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 Adventurous Coco Drop Castle |
Complete all missions in Tower of Adventures Launch Event | This castle, constructed using soft pancake sheets and sweet chocolate bricks, also contains a fully functioning train station! Thanks to the diligent maintenance of the Coco Drops, the trains can depart on wonderful adventures every day. Shall we find out what adventures wait on the horizon today? | |
 Castle of Trickery |
Complete the "Goodbye, Fools" quest by clearing Beast-Yeast 7-30 Purchase Shadow Milk Cookie's Kingdom Package |
In ages past, this grand castle once stood as a beacon of enlightenment, a testament to the power of wisdom. Bathed in an elegant blue glow, its spires still exude an air of majestic grandeur. But never judge a castle by its exterior, for within these halls lie nothing but perilous truths, riddling schemes, and veiled conspiracy. Those who dare to uncover this castle's secrets never see the light of day again... | |
| Bonus effect and alternate castle appearance with: Fountain of Deception 
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 Castle of Delights |
Clear Beast-Yeast 9-30 Purchase Eternal Sugar Cookie's Kingdom Package |
A sweet, pink-hued castle wafting with sugar scents that could lull you into a daydream forever. Built by hands that longed for eternal Happiness in a world without eternity, this castle encourages one thing: sprawling out in mindless relaxation. While doing absolutely nothing might prevent bothersome events... whether such emptiness can truly be called Happiness remains uncertain. | |
| Bonus effect and alternate castle appearance with: Fountain of Delights 
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