01 -
Preheat oven to 350°F. Spread melted butter in a 9x13 baking pan.
02 -
Whisk milk, vanilla, and sugar in a large bowl. Add flour, baking powder, salt, and cinnamon; whisk until just combined.
03 -
Spoon batter over butter, careful not to mix. Sprinkle brown sugar over batter. Gently pour hot water over the batter and sugar.
04 -
Bake for 30-35 minutes until golden brown and mostly set.
05 -
Mix topping sugar and cinnamon; sprinkle over hot cobbler. Let cool slightly before serving.