Double Caramel Pound Cake

Name: Double Caramel Pound Cake
Cuisine: European, Mediterranean, French
Ingredients: 3 sticks - 1 1/2 cups Butter (at room temperature); 2 cups packed Light Brown Sugar; 1 1/2 cups Granulated White Sugar; 6 large Eggs (at room temperature); 3 1/2 cups All Purpose Flour; 1 tsp Baking Powder; 1/2 tsp Salt to taste; 1 1/2 cups (at room temperature) Whole Milk; 1 stick Butter; 1 cup packed Dark Brown Sugar; 1/2 cup Milk or Whipping Cream; 1/2 tsp Pure Vanilla Extract; 4 cups Confectioners' sugar, sifted