Preheat the oven to 160° C fan.
Line the muffin tin w/ the 12/24 paper tins.
Mix butter, sugar, eggs, vanilla extract and salt w/ the electric handheld mixer.
Mix flour & baking powder & add the butter mess. Mix w/ the electric handheld mixer.
Add the limoncello & mix.
Spoon the batter into the paper tins.
Bake in the preheated oven for about 15-20 min.
Make the famous test w/ the wooden stick ...
Prick each muffin w/ the wooden pins several times when still hot.
Add limoncello w/ a brush so that the liquid is soaked up.
Let the muffins cool down to room temperature.
Mix icing sugar & limoncello w/ a spoon & add to the muffins.