60gyour favorite chocolate (I used dark chocolate 72% cacao)
In a large mixing bowl, use a hand mixer to whip the softened butter until light, fluffy and tripled in volume. (The beating time will depend on your type of mixer).
Slowly whip in sweetened condensed milk at room temperature until thoroughly mixed in.
Add melted chocolate and mix until all the ingredients are combined well. Don’t forget to scrape the sides of the bowl after each addition.
Now it’s ready for piping!
Use room temperature butter. This means that you will need to remove your butter from the fridge several hours before you plan on using it.Microwave the chocolate for 20 seconds (or 10 seconds if at a high temperature) then take the bowl out and give it a stir. Place the bowl back in the microwave and repeat the process of cooking for another 20 seconds, stopping, stirring and returning to the microwave until the chocolate has melted.