# Cookbooks
**Cookbooks** will be required to level up your cauldron thus increasing its yield. For each level will be associated a number of Cookbooks you’ll have to sacrifice in the cauldron to make it bigger and produce more $ELXR!
### 🤔 How to get Cookbooks?
You can get Cookbooks in two ways:
* In the [dApp shop](https://app.elexir.finance/shop?tab=cookbook), you're able to buy Cookbooks against **$ELXR**
* [In the incubator](/elexir/our-dapp/incubator.md), you will be able to stake $ELXR to earn Cookbook overtime (coming soon)
### 🏷 Cookbook leveling cost
The amount of Cookbooks required to level up a Cauldron follows this simple formula:
$$
UpgradeCost(level) = level -1
$$
**UpgradeCost** is in **Cookbooks.** As an example, if you want to upgrade to level 3, you need 2 cookbooks. If you need to upgrade to level 8, you need 7 cookbooks and so on…
### ✨ Cookbook Supply
The supply of Cookbook is infinite but controlled by the MagicFed. They will be released in batches to control the supply.
The supply limit of Cookbook is a key feature which will create scarcity for high level cauldrons and incentivize wizards to either invest in leveling up cauldrons or minting new cauldrons.
Now that you leveled up your Cauldrons, let’s see how to can take your profits out ✨
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