Follow these steps to create the Best Pumpkin Cinnamon Roll Blondie With Frosting:

1. Preheat your oven to 350°F (175°C). Grease a 9×13-inch baking pan and set it aside.

2. Cream Butter and Sugars: In a large bowl, beat together the softened butter, brown sugar, and granulated sugar until light and fluffy.

3. Add Eggs and Pumpkin: Mix in the eggs, canned pumpkin puree, and vanilla extract until thoroughly combined.

4. Combine Dry Ingredients: In another bowl, whisk together the flour, baking powder, baking soda, cinnamon, nutmeg, and salt.

5. Mix Together: Gradually add the dry ingredients to the wet ingredients, mixing until just combined. Avoid overmixing.

6. Spread in Pan: Pour the batter into the prepared baking pan, spreading it evenly.

7. Bake: Place the pan in the preheated oven and bake for 25-30 minutes, or until a toothpick inserted in the center comes out clean.

8. Cool: Once baked, remove from the oven and let the blondies cool in the pan for about 20 minutes. Then transfer them to a wire rack to cool completely.

9. Prepare Frosting: While the blondies cool, beat together the softened cream cheese, softened butter, powdered sugar, and vanilla extract until smooth. Add milk as necessary for desired consistency.

10. Frost: Once the blondies are completely cool, spread the frosting evenly over the top.

11. Slice and Serve: Cut into squares and enjoy your delicious Pumpkin Cinnamon Roll Blondies!