This is an easy no-brainer that I use for both home and Dutch oven. Works in 10"x10" or 9x13" pans, or 10"-12" Dutch oven.
Preheat oven to 350 degrees.
Cut up 3/4 cup (about 1 1/2 sticks) of butter in pan, put in oven for 5 minutes and melt
Mix 1 1/2 cups flour, 1 1/2 cups sugar, 3 teaspoons baking powder, 1/4 teaspoon salt. Add in 1 1/4 cup of milk and 1/4 teaspoon of vanilla. Mix well and it will be a little thin, for pouring.
Pour the mixture over the butter evenly. The butter will have coated the bottom and rise up the sides as the batter goes in. DO NOT MIX.
MIX 3 cups fresh peaches and 1 cup fresh blueberries with 2 tablespoons of lemon juice, and coat evenly. Blot excess liquid off with paper towel.
Layer evenly on top of batter. DO NOT MIX!!
* If using frozen fruit, thaw and dry the peaches. Leave the blueberries frozen, so it doesn't get syrupy and turn the whole cobbler blue.
Coat evenly with 1/2 cup of brown sugar.
Bake for 40-50 minutes, until golden. The batter will rise, and the fruit layer will sink, and it will end up making a sugar coated bread topping.
Allow to cool 10-15 minutes, it will be really hot!!
Serve warm with ice cream