Brownies with Caramel Icing

Ok, this is primarily for the caramel icing, but it sounded funny to name the post that. This recipe comes from Paula Deen via the Dallas Morning News food section. It's really best to cut the results into small squares--they pack a sugar punch!

1 package brownie mix of your choice, prepared, in 9x13 pan

1/3 cup firmly packed dark brown sugar (I only had light and it turned out OK)
6 Tbsp whole milk
1/4 cup butter
2 cups powdered sugar
2 tsp flaky sea salt, optional

Make and bake the brownies, per package instructions, in a 9x13 pan and let cool.

In a medium saucepan, combine the brown sugar, whole milk and butter. Bring to a simmer over medium heat. Simmer 3 minutes. Transfer to a large bowl. Gradually stir in the powdered sugar, beating at medium speed with a mixer until combined.

Gently spread the frosting over the brownies; the frosting will thicken as it cools. (If you want "Salted Caramel Brownies" this is where you would sprinkle with sea salt, gently pressing so it adheres.)  Cool completely. Cut into 1-inch pieces to serve.