Blackberry and Blueberry Cobbler

Step 1
Preheat oven to 375 degrees F (190 degrees C). Spray an 8×8-inch baking dish with cooking spray.

Step 2
Stir blueberries, blackberries, orange juice, and 3 tablespoons white sugar together in a bowl. Allow berries to stand 20 to 30 minutes to accumulate juice.

Step 3
Whisk flour with baking powder in a bowl until thoroughly combined. Mix 1 cup sugar with melted butter, egg, and vanilla extract in a separate bowl until thoroughly combined. Whisk flour mixture gradually into the liquid ingredients to make a smooth batter.

Step 4
Spread a thin layer of batter over bottom of the prepared baking dish; top with berry mixture and juices. Spoon remaining batter over berries and spread into an even top layer; sprinkle top with white chocolate chips and brown sugar.

Step 5
Bake in the preheated oven until the cobbler is golden brown, the filling is bubbling, and the chips have melted, 30 to 35 minutes.