It doesn't get much easier than this.
Here's what you'll need:
Preheat the oven to 350 degrees
1 - 9" X 9" baking pan, completely lined with foil and sprayed with a cooking spray.
1- Family Size box (19.5oz.) Brownie Mix I use 1 bag of Ghirardelli Triple Chocolate Brownie Mix. It's the only brownie mix I ever use for all of my brownie recipes.
1 - (15oz.) can of 100% Pure Pumpkin
1/2 C Butter
2 C Confectioner's Sugar
1/2 tsp Pumpkin Pie Spice
In a medium mixing bowl:
Mix by hand just until incorporated, don't over mix.
Spread batter into the pan.
Bake for 25 - 30 minutes until a toothpick in the center comes out clean.
Remove pan to a rack and cool completely.
Make the Frosting:
In a large bowl with an hand mixer:
Beat until smooth.
Gradually add Confectioner's sugar in a few batches, on low speed.
Increase the speed and beat until fluffy.
Remove the brownies from the pan onto a flat surface.
Spread Frosting evenly over the brownies.
Cut into squares.
Peace in the Kitchen!