Raspberry Peach Cobbler

1/3 cup unsalted butter
3 cups sliced peaches
1 cup raspberries
1 cup sugar
1 cup flour
2 tsp baking powder
Pinch of salt
1 cup milk
1 tsp vanilla extract.

Pre-heat oven to 350 degrees. Place butter in square dish and put in oven to melt. In another bowl, mix sugar, flour, powder, salt, milk and vanilla. Once butter is melted, take dish out of oven, add mixture, then top with peaches and raspberries. Push fruit down with spatula. Bake for 1 hour. Serve with vanilla ice cream or whipped cream