Step 1

With an electric mixer or stand-up mixer, mix 3 cups of flour, sugar, salt, baking powder, milk, eggs, and vanilla. Once combined well, slowly stir in 4 T melted butter. Pour batter into a greased 9x13 baking pan.

Step 2

In a large bowl, mix the 2 sticks of softened butter, brown sugar, 2 T 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.

Step 3

Bake at 350 degrees for 25-30 minutes or until toothpick comes out nearly clean from center. Place powdered sugar, milk, and vanilla in a large bowl. Whisk until smooth. Drizzle over warm cake. Serve warm or at room temperature.