"A Brazilian child's favorite treat. Served at birthday parties in their true bonbon form or eaten warm with a spoon directly from the pan. Condensed milk, cocoa, and butter come together for a treat everyone will love. Serve at room temperature."
Combine condensed milk, cocoa, and 2 tablespoons butter in a saucepan; bring to a boil. Reduce heat to low and cook, stirring constantly, until brigadeiro mixture thickens and pulls away from the bottom and sides when the pan is tilted, 10 to 15 minutes.
Remove from heat and let brigadeiro mixture cool to room temperature, about 1 hour.
Scoop teaspoonfuls of the brigadeiro mixture and roll into balls with greased hands.
Spread chocolate sprinkles on a shallow plate. Dip and roll brigadeiros in sprinkles.