Preheat the oven to 180ºC. Grease the baking tray with butter, sprinkle with flour and remove the excess.
In a large bowl, sift the flour, baking powder and salt.
In a blender, add the carrots, oil, eggs and sugar. Beat until completely smooth.
Transfer the ingredients from the blender to the bowl with the dry ingredients.
Mix everything gently with a fouet or spatula until you get a homogeneous mixture, without too many lumps of flour.
Transfer the dough to the baking tray.
Bake for approx. 45 min (Test it: the cake is ready when you stick a toothpick in the middle of the cake and it comes out clean )
Remove the cake from the oven and wait 10 min to remove from the pan and/or put the icing on.