Preheat the oven to 350F. Combine milk, cream cheese, eggs, and pumpkin puree in a bowl. Whisk together. Add dry ingredients - yellow cake mix, and spices. Mix everything thoroughly and transfer to a square (approximately 8 x 8 inches)or rectangular (6 x 9 inches) baking dish.
Bake for 35-40 minutes or until a toothpick comes out mostly clean with moist crumbs attached, do not bake too long. Let cool in the baking dish on a cooling rack (about an hour).
Cake Mix Pumpkin Cupcakes - if baking in muffin pan, line with paper liners and fill 3/4 of the way full. Bake about 18 minutes or until tops spring back when gently touched in the center. Remove from tin and on to a cooling rack to cool.
Frosting - Add all ingredients listed below in a bowl. Beat everything with a mixer until you get a homogeneous, smooth, fluffy mass. Use a spatula to apply the glaze to the surface of the cake and refrigerate for at least half an hour. Then cut the cake into pieces and serve.
Notes
Frosting Ingredients
1 cup mascarpone1/3 cup whipping cream1 tsp vanilla extract3 tbsp icing sugar