Do you have recipes that you want to re-use elsewhere in a project? You can copy recipes from the Flow for use in the same project.
From the Flow, click the recipe you want to copy, and a Copy action will appear in the Actions sidebar on the right.
You will be asked to choose on which dataset the recipe should be applied before the recipe is copied.
Note that, in many cases, you can avoid keeping multiple identical recipes up to date by stacking your data, via the Stack recipe, then splitting your data, via the Split recipe. This is particularly helpful when managing training and testing datasets for machine learning. More information can be found on the Dataiku Academy in the Visual Recipes Overview.
If you are looking to copy the steps of a Prepare recipe, you can use the method described here, but you also have the option of copying the steps themselves. Once you have the steps copied to your clipboard, you can paste them into Prepare recipes in other projects. That process is described in detail in the reference documentation.
There are other methods of duplicating recipe steps or even entire projects: