Blackberry Peach Cobbler Bars

Ingredients:
1 cup butter, softened
1 cup firmly packed light brown sugar
1 ½ cups white sugar, divided
4 large eggs
1 tablespoon vanilla
1 teaspoon baking powder
¾ teaspoon salt
3 ¼ cups all-purpose flour, divided
4 cups fresh blackberries
4 cups peeled and sliced fresh, ripe peaches
1 cup chopped toasted pecans

Directions:
1. Preheat oven to 350 degrees. Beat together butter and brown sugar; add 1 cup white sugar and mix at medium speed with an electric mixer until creamy. Add eggs, 1 at a time, beating just until blended after each addition. Stir in vanilla.
2. In a separate bowl, stir together baking powder, salt, 3 cups flour; gradually add to butter mixture, beating just until blended. Spread ¾ of batter in a greased and floured 9x13-inch pan. Sprinkle with blackberries.
3. Stir together remaining ½ cup white sugar and ¼ cup flour in a medium bowl. Add peaches, stirring to coat. Spoon mixture over blackberries.
4. Stir pecans into remaining batter and spoon over peach mixture.
5. Bake for 1 hour or until golden and bubbly. Cool completely on a wire rack for about 1 hour. Cut into bars.