Preheat oven to 375°. Pour melted butter into a 10-inch enamel-coated cast-iron skillet.
In a medium bowl, toss together blueberries, apricots, ¼ cup sugar, lemon zest and juice, and cinnamon.
In a large bowl, stir together flour, baking powder, salt, and remaining ¾ cup sugar. Whisk in milk until smooth. Pour mixture over melted butter in skillet. Arrange fruit over batter, placing apricots cut side up.
Bake until golden brown and a wooden pick inserted in center comes out clean, about 40 minutes.
Recipe by Southern Lady Magazine at https://southernladymagazine.com/blueberry-apricot-cobbler-recipe/