Brown sausage patties in a skillet over medium high heat for 3–5 minutes per side. Drain on paper towels and let cool slightly.
In a bowl, sift together flour, baking powder, salt, and sugar.
In another bowl, whisk milk, egg, vanilla, melted butter, and maple syrup until smooth.
Pour wet ingredients into dry. Stir gently until mostly smooth some lumps are fine.
Preheat griddle and coat lightly. Dip each sausage patty in batter to coat.
Cook on the griddle 2–3 minutes per side until golden and cooked through. Repeat with remaining patties.