Preheat oven to 350°F (175°C) and line a 9×9-inch baking dish with parchment or nonstick spray.

In a bowl, mix brownie mix, eggs, melted butter, and milk until smooth; add a splash more milk if too stiff.

Spread half the batter in the pan, sprinkle chopped Snickers, then cover with remaining batter and top with caramel bits.

Bake 40–43 minutes until edges are firm and a toothpick comes out with gooey caramel but no raw batter.

Cool 20–30 minutes before cutting into squares.