I saw this on Reddit and had to try it.
Cinnamon Roll Cake
2 cups self rising flour
4 eggs
1/2 cup crisco
1 1/2 cups sugar
1 cup milk or buttermilk or a mixture of both
2 tsp. vanilla
Beat sugar and crisco, add eggs and beat. Add flour, milk and vanilla, beat 1 to 2 minutes. Spread 1/2 of this into a greased and floured 9 x 13 pan.
Filling
1/2 cup brown sugar
4 tsp. cinnamon
Mix this and sprinkle evenly onto layer in pan. Then pour and spread rest of batter on the filling. Swirl with a knife.
Bake at 350 for 30 minutes.
Icing
2 cups powered sugar
3 tbsp. butter
1/4 cup milk
1 tsp. vanilla
1/4 cup cream cheese (I added, it needs this)
Heat milk and butter, add sugar and vanilla. Poke holes in the cake. Pour icing over warm cake.