Cinnabon Cinnamon Roll Cake

My mom got this recipe from one of her Bunko Babes  and I decided to give it a try; it was so good that I made once and then my mom made one the next day because it was all gone.

3 cups flour
1/4 teaspoons salt
1 cup sugar
4 teaspoons baking powder
1 1/2 cup milk
2 eggs
2 teaspoons vanilla

1/2 cup butter, melted
2 sticks (1 cup) butter, softened
1 cup brown sugar
2 tablespoons flour
1 tablespoon cinnamon
2/3 cups nuts (optional)

Frosting:
4 ounces cream cheese, softened
1/4 cup butter, softened
1 1/2 cups powdered sugar
1 tablespoon vanilla
3 tablespoons maple syrup
1-2 teaspoons milk

With an electric or stand-up mixer, mix flour, sugar, salt, baking powder, milk, eggs, and vanilla. Once combined well, slowly stir in 4 tablespoons melted butter. Pour batter into a greased 9x13" baking pan.

In a large bowl, mix the 2 sticks of softened butter, brown sugar, flour, cinnamon, and nuts until well combined. Drop evenly over cake batter by the tablespoon and use a knife to marble/swirl through the cake.

Bake at 350 degrees for 25-30 minutes or until toothpick comes out nearly clean from center. Place Cream cheese, butter, powdered sugar, maple syrup, milk, and vanilla in a large bowl. Beat until smooth. Spread over warm cake. Serve warm (we like it straight out of the oven) or at room temperature.