Preheat oven to 425 degrees. In a medium bowl, stir together brown sugar, cinnamon and two tablespoons heavy cream until smooth and well combined. Set aside.
Place butter in an 8x8 baking dish and mricrowave on high until totally melted.
In a large bowl, whisk together flour, sugar, baking powder and salt. Add one cup heavy cream and buttermilk and stir until just blended.
Pour half of the batter into your dish with the butter, then top with dollops of your cinnamon sugar mixture here and there. Use a knife to swirl the brown sugar mixture. Top with the remaining batter. Spread genthly and evenly. It doesn't have to look pretty. Score the batter with a knife into 9 or 12 squares.
Bake until the biscuits are lightly browned and cooked through, about 25-27 minutes.
While the biscuits are baking make your cream cheese glaze. Whisk together your confectioners' sugar, cream cheese and remaining heavy cream until smooth. Spread evenly over hot biscuits. Serve warm or at room temperature.