Heat the milk in the microwave until it reaches a temperature between 105°F-110°F. Pour it into the mixing bowl of a stand mixer and add the sugar. Stir to combine. Next, sprinkle in the active yeast so it coats the top of the milk. Leave for 5 minutes and let it become foamy.
Once foamy, pour in the mashed banana, melted butter and vanilla. Gently stir to combine. Using the dough hook attachment, turn your mixer on low and slowly add spoonfuls of flour to the bowl. Once all the flour has been added, knead for approximately 6-7 minutes until dough is smooth.
Grease a separate large bowl with oil or butter. Form your dough into a large ball and place it in the oiled bowl.
Cover with a light towel and let it rise at room temperature for 1 to 1 ½ hours until it has doubled in size.
Sprinkle flour over a clean surface, and place the dough onto it. Roll out the dough into a rectangular shape that’s about 18 x 14 inches. Spread the softened butter over the surface of the rolled-out dough. Mash 2 bananas, and spread that over the layer of butter.
In a bowl, mix together the brown sugar, cinnamon and nutmeg then sprinkle it evenly over the mashed banana.
Roll the dough into a log shape. Measure and slice 12 slices, trimming the extra off the edges of the log. You can use unflavored dental floss for a clean cut, or slice it with a sharp knife, cleaning it after each slice.
Carefully transfer the slices into a greased 9 x 13 inch baking pan. Cover the pan with a towel, and allow it to rise for another 30 minutes.
Preheat the oven to 350°F. Uncover the cinnamon rolls. Drizzle the heavy cream evenly over the top of the cinnamon rolls. Bake for 25-27 minutes, or until lightly golden and fluffy.
While the rolls bake, make the cream cheese frosting. Combine cream cheese and butter until smooth. Then, mix in the powdered sugar, cinnamon, ginger, and nutmeg. You can add a tablespoon or two of milk to thin out the glaze if you’d like.
While the cinnamon rolls are still warm, spread the cream cheese frosting over the top. Slice and serve while warm. Enjoy!