Heat oil to 350°F in a large skillet or Dutch oven.
In a bowl, whisk together flour, sugar, baking powder, and salt.
In a separate bowl, whisk eggs, milk, and vanilla.
Combine wet and dry ingredients until smooth.
Transfer batter to a squeeze bottle or funnel.
Drizzle batter into hot oil in overlapping circular patterns.
Fry for 1–2 minutes per side until golden brown.
Remove and drain on paper towels.
Dust generously with powdered sugar.
Drizzle with chocolate sauce and serve immediately.