Preheat your oven to 350°F (175°C) and grease a loaf pan.
In a bowl, mix together the pumpkin puree, 1/2 cup of granulated sugar, vanilla extract, 1 tablespoon of cinnamon, pumpkin pie spice, and a pinch of salt. Then, crack in the egg and stir until smooth.
Separate each of the Pillsbury Grands Biscuits and cut them in half horizontally to create two thin layers. This will give you 16 biscuit pieces.
In another bowl, combine the remaining 1/2 cup sugar and 1 tablespoon of cinnamon. Take each biscuit piece, dip it into the sugar mixture, then spread a thin layer of the pumpkin mixture on one side. Stack them vertically, pumpkin-side up, one by one.
Once you’ve coated all the biscuit pieces, stack them into your prepared loaf pan. Don’t worry if it looks messy—it will all come together perfectly as it bakes!
Place the loaf in the preheated oven and bake for 30-35 minutes, or until the top is golden brown and the biscuits are fully cooked through.
While the loaf is baking, whisk together the powdered sugar, heavy whipping cream, and cinnamon. Adjust the thickness by adding more cream or powdered sugar if needed.
Once the loaf is done baking, let it cool for about 10 minutes before drizzling the cinnamon glaze on top. Pull apart the layers and enjoy warm!
