Cinnamon Roll Swirl Cake - Indiana Connection

Ingredients

• 3 cups flour
• ¼ t. salt
• 1 cup sugar
• 1 t. baking powder
• 1½ cups milk
• 2 eggs
• 2 t. vanilla
• ½ cup butter, melted
• 1 cup butter, softened
• to almost melted
• 1 cup brown sugar
• 2 T. flour
• 2 T. cinnamon
• 2 cups powdered sugar
• 5 T. milk
• 1 t. vanilla