Melt the butter in a non stick pan. Once the butter has melted add in the condensed milk and mix . Add the cocoa powder (dissolved in little water) and mix.

Now heat while stirring continuously with a wooden spoon until it thickens . This might take 15-20 mins. Once it thickens, it ll coat the back of your spoon ( will not fall off it immediately) and as your stirring, you ll be able to see the bottom of your pan.

Spread it onto a plate ( stainless steel should be good) or baking tray and chill for about 30 minutes to firm it up.

Take spoonfuls of this mixture in your greased (with butter) hands and make balls. You could use teaspoonfuls and make small ones or tablespoonfuls for big ones.

Roll in the sprinkles/cocoa/nuts. Place in cupcake liners or butter/parchment paper . Place all the rolled truffles in the fridge for another 30 minutes to firm up.