Cinnamon Roll Cake

This is on my breakfast menu for tomorrow.  How about yours?   Okay, okay...it's on the menu for lunch and dinner too!

   3 cups flour
   1/4 tsp. salt
   1 cup sugar
   4 tsp. baking powder
   1 1/2 cups milk
   2 eggs
   2 tsp. vanilla
   1/2 cup butter melted
    
    -TOPPING -
   1 cup butter softened (2 sticks)
   1 cup brown sugar
   2 Tbsp. flour
   1 Tbsp. cinnamon
    
    -GLAZE -
   2 cups powdered sugar
   5 Tbsp. milk
   1 tsp. vanilla

Instructions

1. Preheat oven to 350 degrees. Spray a 9×13 glass baking pan with cooking spray. Set aside.
2. In an electric or stand mixer add the flour, salt, sugar, baking powder, milk, eggs, and vanilla. Once combined well , slowly stir in the melted butter. Pour into the prepared 9×13 baking pan.
3. For topping, In a large bowl mix the 2 sticks of butter, brown sugar, flour and cinnamon together until well combined and creamy. Drop evenly over the batter by the tablespoonfuls and use a knife to marble/swirl through the cake.
4. Bake at 350 for 35-40 minutes or when a toothpick inserted near the center comes out nearly clean.
5. FOR GLAZE: In a medium bowl, mix the powdered sugar, milk and vanilla together with a whisk. Drizzle evenly over the warm cake. Serve warm or at room temperature.