Cinnamon Swirl Cake

I got this recipe from Patty Larson at my bridal shower. Everyone was supposed to bring a recipe to share with me (the blushing bride) but only like 2 people actually did. It has turned out to be one of my favorite recipes. It's like eating a cinnamon roll, but way easier to make.1 cube butter, softened

1 1/2 cups milk

2 eggs

2 tsp. vanilla

3 cups flour

1 cup sugar

4 tsp. baking powder

1/4 tsp. salt

*Mix together and pour into a 9X13 pan. Then mix:

1 cube melted butter

2/3 cup brown sugar

1 T. flour

1 T. cinnamon

*Pour on top of yellow mixture and swirl in using a fork. Don't mix completely. Bake at 375 for 30 minutes. Drizzle with frosting:

1/2 cube butter, softened

powdered sugar

some milk

1 tsp. vanilla

dash of salt