Creating Peach Cake with Brown Sugar Frosting is simple and enjoyable. Follow these detailed steps to ensure your cake is a success:

1. Preheat the Oven: Preheat your oven to 350°F (175°C). Grease and flour two 9-inch round cake pans.

2. Mix Dry Ingredients: In a large bowl, whisk together the flour, baking powder, baking soda, and salt.

3. Cream Butter and Sugar: In another bowl, beat the softened butter and granulated sugar until light and fluffy. This should take about 3-4 minutes.

4. Combine Wet Ingredients: Add eggs one at a time, mixing well after each addition. Then, stir in the buttermilk and vanilla extract.

5. Combine Mixtures: Gradually add the dry mixture to the wet mixture, stirring until just combined. Do not overmix.

6. Fold in Peaches: Gently fold in the diced peaches, ensuring even distribution throughout the batter.

7. Bake: Divide the batter evenly between the prepared pans. Bake for 30-35 minutes or until a toothpick inserted in the center comes out clean.

8. Cool the Cakes: Once done, remove the cakes from the oven and let them cool in the pans for about 10 minutes. Then, turn them out onto wire racks to cool completely.

9. Prepare the Frosting: In a mixing bowl, combine the brown sugar, softened cream cheese, heavy cream, and vanilla extract. Beat until smooth and fluffy.

10. Frost the Cake: Once the cakes are completely cool, place one layer on a serving plate and spread a generous amount of frosting on top. Add the second layer and frost the top and sides of the cake.

11. Decorate: Optionally, garnish the top with fresh peach slices for a beautiful presentation.