Preheat oven to 350 degrees F, spray a 9”x13” cake pan with non-stick cooking spray or line it with parchment paper, and set aside.

In a large bowl, add in the cake mix, water, oil, eggs, and cinnamon. Stir until combined.

Fold in your peaches until combined and pour into the prepared pan. Bake for about 25-30 minutes or until the center of the cake is set and a toothpick comes out clean.

Remove from oven and let cool completely.

Meanwhile in large bowl add all your frosting ingredients and beat until stiff peaks form.

Spread over the cooled cake, sprinkle with cinnamon if desired, and slice and serve.