- Delivers the warm, comforting flavors of autumn in every bite
- It's an easy sheet cake that bakes very quickly
- The perfect pumpkin dessert to serve a crowd
Preheat the oven to 350°F (180°C). Spray an 18x13x1 inch sheet tray with baking spray and set it aside. In a medium-sized bowl, stir together the flour, baking soda, pumpkin pie spice, cinnamon, salt, and nutmeg. Set aside.
Continue to whisk constantly until the mixture comes to a boil. Once it comes to a continuous boil, take off the heat and whisk in the powdered sugar a little at a time until fully mixed in.
Immediately and slowly pour the frosting carefully all over the cake; it should go right to the edge, but if it looks like it may overflow, do not use it all. Allow the frosting to set fully, about 1 hour. Slice and serve.