Easy Summer Berry Cherry Cobbler

Ingredients

• 4 cups pitted cherries
• 4 cups frozen mixed berries
• 1/2 cup sugar
• 3 tbsp. cornstarch
• 2 tsp vanilla extract
• 1 1/3 cups all purpose flour
• 1/4 cup sugar
• 1 1/2 tsp baking powder
• 4 tbsp. cold butter cut into small cubes
• 1/3 cup milk
• 1/3 cup sour cream
• 1 egg
• 1 tsp vanilla extract