In a second bowl, combine the vegetable oil, eggs, sugar and pumpkin puree. Whisk until the ingredients are just combined.
1 cup vegetable oil, 1 cup sugar, 4 eggs, 15 ounces pumpkin puree
Add the wet ingredients to the dry, and use a whisk or spatula to gently blend the ingredients together.
Pour the cake batter into the baking pan, and transfer it to an oven. Bake for about 30 minutes, or until a toothpick inserted into the middle comes out clean.
Allow the cake to rest for 10-15 minutes, then transfer it to a cooling rack and allow it to cool down completely.
Make the frosting by combining slightly softened butter with cream cheese and powdered sugar. I recommend using an electric whisk to make the frosting completely smooth.
8 ounces cream cheese, ½ cup unsalted butter, 2 ½ cup powdered sugar, ½ teaspoon vanilla extract
Spread the frosting across the top of the cake, and cut it into 20 small squares. Store the cake in a refrigerator until it's ready to serve.
Notes
Prep Tips:
Use pure pumpkin puree, not pumpkin pie filling, since the recipe already includes the sugar and spices separately.
Make sure the cream cheese and butter are at room temperature before making the frosting. This helps the frosting blend smoothly without lumps.
Don't overmix the batter once the wet and dry ingredients are combined. Mix just until everything comes together to help keep the cake tender.
The batter is quite moist and dense, so the pan size makes a noticeable difference. If using an 8x8-inch pan, don't fill it more than about ¾ full.
If the cake is browning on top before the center is fully baked, loosely cover it with foil and continue baking until a toothpick comes out clean.
Since ovens and pans can vary, start checking for doneness toward the earlier end of the suggested baking time rather than relying on the clock alone.
Variations:
Stir chocolate chips or raisins into the batter before baking for little bursts of sweetness.
Swap the pumpkin pie spice for cinnamon or gingerbread spice for a slightly different flavor.
Give the cream cheese frosting a twist by adding a few drops of your favorite flavor essence.
Try a different frosting, such as caramel, toffee, chocolate, or coffee frosting.
Serving Suggestions:
Serve the cake chilled or slightly cool from the refrigerator, especially if you like a firmer cream cheese frosting.
Cut it into small squares for an easy dessert to serve at fall gatherings, potlucks, or parties.
Pair a piece with a cup of coffee, tea, or hot apple cider for a cozy fall treat.
For a festive fall finish, garnish the frosted cake with small pieces of oven-dried blueberries.
Storage:
Store the frosted cake in an airtight container in the refrigerator until ready to serve.
Keep leftovers refrigerated because of the cream cheese frosting.
For the best texture, let refrigerated pieces sit out briefly before serving if you prefer the cake softer and the frosting less firm.