diff --git a/packages/gatsby-plugin-netlify-cms/README.md b/packages/gatsby-plugin-netlify-cms/README.md
index cd869e9e19b7e..84f2fd8303277 100644
--- a/packages/gatsby-plugin-netlify-cms/README.md
+++ b/packages/gatsby-plugin-netlify-cms/README.md
@@ -171,6 +171,13 @@ Customize the path to Netlify CMS on your Gatsby site.
 Customize the value of the `title` tag in your CMS HTML (shows in the browser
 bar).
 
+### `htmlFavicon`
+
+(_optional_, type: `string`, default: `""`)
+
+Customize the value of the `favicon` tag in your CMS HTML (shows in the browser
+bar).
+
 ## Example
 
 Here is the plugin with example values for all options (note that no option is
@@ -185,6 +192,7 @@ plugins: [
       enableIdentityWidget: true,
       publicPath: `admin`,
       htmlTitle: `Content Manager`,
+      htmlFavicon: `path/to/favicon`,
     },
   },
 ]
diff --git a/packages/gatsby-plugin-netlify-cms/src/gatsby-node.js b/packages/gatsby-plugin-netlify-cms/src/gatsby-node.js
index bd805360bb81c..6d3c49385020b 100644
--- a/packages/gatsby-plugin-netlify-cms/src/gatsby-node.js
+++ b/packages/gatsby-plugin-netlify-cms/src/gatsby-node.js
@@ -55,6 +55,7 @@ exports.onCreateWebpackConfig = (
     publicPath = `admin`,
     enableIdentityWidget = true,
     htmlTitle = `Content Manager`,
+    htmlFavicon = ``,
     manualInit = false,
   }
 ) => {
@@ -135,6 +136,7 @@ exports.onCreateWebpackConfig = (
        */
       new HtmlWebpackPlugin({
         title: htmlTitle,
+        favicon: htmlFavicon,
         chunks: [`cms`],
         excludeAssets: [/cms.css/],
       }),