Blackberry Peach Cobbler

Ingredients (12)

• 1 1/2 pounds peaches (4-5 medium peaches), pitted and sliced
• 6 ounces blackberries
• Zest from 1/2 a lemon
• Squeeze lemon juice
• 1/4 cup (4 Tablespoons) unsalted butter, softened
• 1 cup sugar, divided
• 3/4 cup flour
• 1 1/2 teaspoons baking powder
• 3/4 teaspoon salt
• 1 teaspoon vanilla
• 1/3 cup whole milk
• 1/4 cup boiling water