Cinnamon Swirl Cake

3 c. flour
¼ t. salt
1 c. sugar
4 t. baking powder
1 ½ c. milk
2 eggs
2 t. vanilla
1 c. melted butter

SWIRL stuff:
1 cube melted butter
1 c. brown sugar
2 T. flour
1 T. cinnamon
2/3 c. chopped nuts

Mix flour, salt, sugar, baking powder, milk, eggs, vanilla, and 1 c. melted butter in that order.
Pour into greased and floured 9x13 pan.
Mix swirl ingredients together and swirl into batter.
Bake at 375 for 25-30 minutes.
Glaze like cinnamon rolls.
Optional glaze:
2 c. powdered sugar & 5 t. milk & 1 t. vanilla.