Creating your Peach Cake with Brown Sugar Frosting is simple if you follow these easy steps:

1. Preheat Oven: Preheat your oven to 350°F (175°C). Grease and flour a 9×13 inch baking pan.

2. Mix Dry Ingredients: In a medium bowl, whisk together the flour, baking powder, salt, and cinnamon to combine. Set this mixture aside.

3. Cream Butter and Sugar: In a large mixing bowl, cream the softened butter and granulated sugar until light and fluffy.

4. Add Eggs and Vanilla: Add the eggs one at a time, mixing well after each addition. Stir in the vanilla extract.

5. Combine Wet Ingredients: Alternate adding the flour mixture and buttermilk into the batter, starting and ending with the dry ingredients. Mix until just combined.

6. Fold in Peaches: Gently fold the diced peaches into the batter until evenly distributed.

7. Pour Batter into Pan: Pour the batter into the greased 9×13 inch baking pan. Smooth the top with a spatula.

8. Bake: Bake in the preheated oven for 30-35 minutes, or until a toothpick inserted in the center comes out clean.

9. Cool Completely: Remove the cake from the oven and let it cool in the pan for 20 minutes. Transfer to a wire rack to cool completely.

10. Make Brown Sugar Frosting: In a bowl, beat the softened butter until creamy. Gradually add in the brown sugar, heavy cream, and powdered sugar. Beat until smooth and spreadable.

11. Frost the Cake: Once the cake has cooled completely, spread the brown sugar frosting evenly over the top using a spatula.

These steps will guide you through the seamless process of creating this fabulous Peach Cake with Brown Sugar Frosting!