Prepare the dough. Mix eggs and sugar thoroughly until smooth at low speed. Pour in milk and slightly cooled melted butter. Add salt and vanilla, mix again. Pour flour into the resulting mass in small portions, add baking powder. Lastly, add raisins. When all ingredients are added, mix thoroughly.
Bake the waffles. Heat the waffle iron and grease it with vegetable oil. Put the dough on the panels, for each waffle use 1-2 tbsp. Baking takes about 5 minutes on average, but you can hold it a little longer for crispiness.