Begin by gathering all necessary ingredients. Preheat your oven to 350 degrees Fahrenheit (175 degrees Celsius) and prepare a 9x13-inch baking pan by greasing it lightly.
In a mixing bowl, combine the pumpkin puree, sugar, vegetable oil, and eggs. Mix thoroughly until the mixture is smooth and uniform.
In a separate bowl, sift together the all-purpose flour, ground cinnamon, baking powder, baking soda, ground cloves, ground ginger, ground nutmeg, and salt.
Gradually incorporate the dry ingredients into the pumpkin mixture, stirring gently until everything is well blended. Pour the batter evenly into the prepared baking pan.
Bake in the preheated oven for approximately 25 to 30 minutes, or until the top springs back when lightly pressed.
Once baked, remove the pan from the oven and allow the pumpkin squares to cool completely before cutting them into 24 individual squares.
Optionally, top your cooled squares with cream cheese frosting or a sweet glaze, as desired.
Serve your pumpkin squares and enjoy this delicious treat!