Preheat oven to 350 degrees Fahrenheit. Melt butter in a 9x13 baking pan.
In a mixing bowl mix together the flour, sugar, and baking powder. Add milk and peach schnapps and stir until smooth.
Pour over the melted butter. Do not mix!
Empty the can of peaches with liquid over the batter. Do not mix! Sprinkle with sugar and bake for 45 minutes.
Remove pan from the oven and let cool slightly. Best served warm topped with vanilla ice cream. Note: the cobbler has somewhat gooey texture and that is how it's supposed to be. Don't be alarmed thinking it's undercooked.