Preheat the oven to 350°F (175°C). Grease and flour a baking pan.

In a blender, combine the chopped carrots, sugar, vegetable oil, and eggs. Blend until smooth.

In a mixing bowl, combine the flour, baking powder, and salt. Gradually add the carrot mixture and mix until well combined.

Pour the batter into the prepared baking pan and bake for 30 minutes or until a toothpick inserted comes out clean.

In a saucepan, combine the sweetened condensed milk, cocoa powder, and butter.

Cook over medium heat, stirring constantly until the mixture thickens and starts to pull away from the sides of the pan.

Remove from heat and let cool slightly before pouring over the cooled cake.