Whisk together flour, sugar, baking powder, and salt.
Add egg, milk, and vanilla. Whisk until smooth and slightly runny, with no large lumps.
Heat about 1–2 inches of oil to 350°F (175°C).
Pour the batter into a squeeze bottle, piping bag, or funnel.
Drizzle the batter into the hot oil in overlapping circles and crisscrossing lines.
Fry for about 1–2 minutes per side, until golden brown.
Drain on paper towels.
Finish generously with powdered sugar and serve
