Cinnamon Roll Pumpkin Sheet Cake

box yellow cake mix

eggs

canola or vegetable oil

milk or buttermilk

box Vanilla Instant Pudding Mix (or Butterscotch)

sour cream

can pumpkin

unsalted butter

packed light brown sugar

ground cinnamon

powdered sugar

heavy cream (start w ¼ cup and add a little more cream if needed)