Wash the sage leaves under cold water and dry them well with kitchen paper.
Combine the flour, baking powder, milk, salt and eggs and work with an electric hand-held mixer into thick batter. Cover and let stand at room temperature for at least 1 hour.
Heat the oil. When tiny little bubbles form around the handle of a wooden spoon, you can start frying. Stir the batter with a spatula. Dip each sage leaf into the batter, using a fork, and drop it into the hot oil. Fry until golden on all sides and remove with a slotted spoon. Drain on kitchen paper and serve at once.
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