In a large mixing bowl, combine two and a half cups of flour with a quarter cup of brown sugar, a tablespoon of baking powder, and one and a half tablespoons of ground cinnamon. Whisk the ingredients together until well mixed.
Next, pour in two cups of heavy cream and add a teaspoon of vanilla. Stir everything together until you form a sticky ball of biscuit dough. Set this dough aside.
Take an 8x8 baking dish and melt a stick of butter. Pour the melted butter into the dish.
Place the ball of dough into the baking dish on top of the butter, then spread it out evenly. It doesn't need to be perfect, but make sure to pre-cut the biscuits for easier serving after baking.
Bake in a preheated oven at 450 degrees Fahrenheit for about 25 minutes, or until the top is golden brown and a toothpick inserted comes out clean.
Once baked, allow the biscuits to cool before icing them.
To prepare the icing, mix one and a half cups of powdered sugar with three tablespoons of melted butter, a teaspoon of vanilla, and about two tablespoons of heavy cream. Whisk until smooth.
Finally, drizzle or spread the icing over the warm cinnamon roll biscuits.
