First put all ingredients, except for the flour and baking powder, in a mixing bowl and mix everything well with a mixer. Mix the flour and baking powder in another bowl.
Then add the flour and baking powder mixture to the dough in batches until everything melts into a homogeneous mass and is creamy. The dough is quite runny.
Then lay out parchment paper on a baking sheet and pour the dough onto the sheet. Bake the cake at 180 ° C (top / bottom heat) for about 15 minutes. Do the toothpick test. When the dough no longer sticks to the toothpick, the cake can come out.
For the icing, mix powdered sugar and lemon juice to form an icing. Brush the cooled cake with it.