Gather all your ingredients and tools. This ensures a smooth cooking process without any interruptions.
In a medium saucepan, melt 2 tablespoons of the unsalted butter over low heat. Make sure not to let it brown.
Once the butter is melted, add the sweetened condensed milk, cocoa powder, and salt to the pan. Stir well to combine all the ingredients into a smooth mixture.
Continue to cook the mixture over low heat, stirring constantly. This is crucial to prevent the mixture from sticking to the bottom of the pan. Cook for about 10 to 15 minutes, or until it thickens enough to pull away from the sides of the pan.
Once thickened, remove the pan from the heat and add the remaining tablespoon of butter. Stir until melted and fully incorporated. Transfer the mixture to a greased plate or bowl and let it cool to room temperature.
Once cooled, use a cookie scoop or your hands (greased with a little butter) to portion out small amounts of the mixture. Roll each piece into a smooth ball, about the size of a cherry.
Roll each Brigadeiro in chocolate sprinkles or cocoa powder until fully coated. Place them on a plate or tray lined with parchment paper.
Refrigerate the Brigadeiros for about 30 minutes to firm up before serving. Enjoy them chilled or at room temperature for the best flavor and texture.