diff --git a/esmvaltool/utils/recipe_test_workflow/doc/source/common.txt b/esmvaltool/utils/recipe_test_workflow/doc/source/common.txt
index 6fc3d5b503..e28f0d3ab6 100644
--- a/esmvaltool/utils/recipe_test_workflow/doc/source/common.txt
+++ b/esmvaltool/utils/recipe_test_workflow/doc/source/common.txt
@@ -9,6 +9,7 @@
 .. |ESMValCore| replace:: :term:`ESMValCore`
 .. |ESMValTool| replace:: :term:`ESMValTool`
 .. |Rose| replace:: :term:`Rose`
+.. |KGO| replace:: :term:`KGO`
 
 .. Links
 
diff --git a/esmvaltool/utils/recipe_test_workflow/doc/source/glossary.rst b/esmvaltool/utils/recipe_test_workflow/doc/source/glossary.rst
index 04036452a2..92e2f8694d 100644
--- a/esmvaltool/utils/recipe_test_workflow/doc/source/glossary.rst
+++ b/esmvaltool/utils/recipe_test_workflow/doc/source/glossary.rst
@@ -24,6 +24,9 @@ Glossary
      routine evaluation of |ESMs| in |CMIP|, see the
      `ESMValTool Documentation`_.
 
+   KGO
+     Known good output
+
    Rose
      Rose is a toolkit for writing, editing and running application
      configurations, see the `Rose Documentation`_.
diff --git a/esmvaltool/utils/recipe_test_workflow/doc/source/user_guide/adding_a_recipe.rst b/esmvaltool/utils/recipe_test_workflow/doc/source/user_guide/adding_a_recipe.rst
new file mode 100644
index 0000000000..6c8188b257
--- /dev/null
+++ b/esmvaltool/utils/recipe_test_workflow/doc/source/user_guide/adding_a_recipe.rst
@@ -0,0 +1,59 @@
+.. include:: ../common.txt
+
+Adding a Recipe to the RTW
+==========================
+
+Can your recipe be added to the RTW?
+------------------------------------
+The |RTW| will run a recipe and compare the output to a |KGO|.
+The compare task will fail if the output doesn not exactly match the |KGO|,
+therefore, if the recipe output is not reproducible it cannot be compared to a |KGO|, and the compare task will always fail.
+
+It is recommended that recipes are added to the |RTW| as this will make the process of a release easier,
+and should a breaking change be introduced ESMValTool, the author will be notified when the recipe on the |RTW| fails.
+
+Prerequisites
+-------------
+
+To add a recipe to the |RTW|, the first thing that must be done is run the recipe.
+
+Take note of the resources required to run the recipe and the time it takes.
+
+Inspect the results of your recipe and verify they are as expected.
+
+Add the verified output of the recipe to the KGO_ROOT_PATH of each site. These can be found in in the
+`recipe_test_workflow/opt/rose-suite-<site>.conf` files. Please ensure the |KGO| for the recipe to be
+added is placed in the root path for every site.
+
+If for any reason you are unable to access the KGO_ROOT_PATH directory, please contact the maintainer of the |RTW|.
+
+Add your recipe to the workflow
+-------------------------------
+* Checkout the |RTW|::
+
+    git clone git@github.com:ESMValGroup/ESMValTool.git
+
+* Make a branch of the |RTW|::
+
+    git checkout recipe_test_workflow_prototype
+    git checkout -b add_recipe_branch
+
+* Every recipe in the |RTW| is sorted into one of three groups; fast, medium, and slow, depending on what resources
+  they require and how long they take to run.
+
+  * fast - Anything under 2 minutes to run and under 2G memory required.
+  * medium - Anything between 2 and 6 minutes to run and under 2G memory required.
+  * slow - Anything above this.
+
+
+* Open the flow.cylc file and edit the task parameters of the group the added recipe belongs to::
+
+    [task parameters]
+       fast = radiation_budget, <your_recipe_name>
+       medium = ensclus, heatwaves_coldwaves
+
+  The name of the task parameter must match the file name of the recipe to be added
+
+* Run the branch of |RTW| on all sites and ensure the added recipe passes.
+
+* Make a pull request to merge the branch with the added recipe with `recipe_test_workflow_prototype`
diff --git a/esmvaltool/utils/recipe_test_workflow/doc/source/user_guide/index.rst b/esmvaltool/utils/recipe_test_workflow/doc/source/user_guide/index.rst
index 01359728e2..ef7e2081d3 100644
--- a/esmvaltool/utils/recipe_test_workflow/doc/source/user_guide/index.rst
+++ b/esmvaltool/utils/recipe_test_workflow/doc/source/user_guide/index.rst
@@ -7,3 +7,4 @@ User Guide
 
    quick_start
    workflow
+   adding_a_recipe