1
: Preheat oven to 350ºF (180ºC). Grease or line mini muffin pans with paper liners.
2
: Whisk eggs, sugar and vanilla extract together in a large bowl. Add melted chocolate and butter. Stir well. Stir in sweetened condensed milk.
3
: Stir in flour, cocoa powder, baking powder and salt. Add chocolate chips.
4
: Spoon batter into prepared muffins cups.
5
: Bake in preheated oven for 15 minutes or just until the tops are firm to the touch.