Preheat your oven to 350°F and grease an 8x8-inch baking dish with butter or nonstick cooking spray.
In a medium bowl, cream together the butter and brown sugar until light and fluffy.
In a separate bowl, mix together the peaches, lemon juice, baking powder, flour, salt, milk, and cinnamon until combined.
Pour the peach mixture into your prepared baking dish and spread evenly. Then sprinkle the top with cornbread mix.
Bake in preheated oven for 40-45 minutes or until golden brown.
Let the cobbler cool for 10 minutes before serving warm with a scoop of your favorite ice cream or whipped cream.