> For the complete documentation index, see [llms.txt](https://docs.railgun.org/developer-guide/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.railgun.org/developer-guide/cookbook.md).

# Cookbook SDK

- [Cookbook Overview](https://docs.railgun.org/developer-guide/cookbook/cookbook-overview.md): RAILGUN Cookbook: Convert your dApp into a zkApp
- [Recipe Guide: Write a zkApp](https://docs.railgun.org/developer-guide/cookbook/write.md): dApp -> zkApp in 3 easy steps
- ["Step" — A smart contract call](https://docs.railgun.org/developer-guide/cookbook/write/step.md)
- ["Recipe" — Steps in series](https://docs.railgun.org/developer-guide/cookbook/write/recipe.md)
- ["Combo Meal" — 2+ Recipes](https://docs.railgun.org/developer-guide/cookbook/write/combo-meal.md)
- [Use your zkApp privately](https://docs.railgun.org/developer-guide/cookbook/use-your-zkapp-privately.md): "Cook a Recipe" anonymously with RAILGUN Quickstart