Summer's Brigadeiro

1 can sweetened condensed milk
3 tablespoons butter
3 tablespoons cocoa
chocolate sprinkles

Melt butter in medium-sized pan. Pour sweetened condensed milk into pan and mix together. Never stop stirring. Add cocoa and mix. Continue to stir the mixture for 10-15 minutes until it starts to stick together. Let the mixture cool. Once cool, roll into balls and then roll in chocolate sprinkles.