Add the salted butter to a saucepan over medium-low heat.
Stir with a spatula, scraping down the sides as needed. Cook until the butter turns golden brown and small brown bits form on the bottom of the pan.
Pour the browned butter into a separate bowl to cool for 2 minutes.
To a blender, add the sweetened condensed milk, half & half, dark brown sugar, cocoa powder, vanilla extract, and salt.
Add in the browned butter, and blend until smooth (15-30 seconds).
Pour the creamer into an airtight container and refrigerate for up to 2 weeks. Shake well before each use.