In the bowl of the blender and with a hook (you can also knead with your hands), put the flour, the salt, the sugar and the zests of lemon. Add the previously crumbled baking powder and three fourths of the egg mixture, water and rum and switch the blender on. When the dough starts unpeeling from the sides of the bowl, add the remaining egg, water and rum and mix again.
When the dough starts unpeeling from the sides of the bowl again, add the butter ointment and switch the blender back on until the dough unpeels again. Stop the blender and cover the bowl with a cling film, taking away the hook.
Leave the dough to raise at a temperature of 25 °C (75F°), if possible until its volume has increased 1.5 fold.
Lower the dough to a thickness of 1 cm with a rolling pin and cut out pieces of about 8 x 5 cm. Free your imagination as far as shape is concerned!
In a fryer or a pan, warm up the oil at 180 °C (355°F). Dip the soft angel wings in boiling oil and cook for about 2 minutes.
Finally, dip-dry them and arrange on absorbent paper and sprinkle with ice sugar.