Step 1: Prep the Peach Cobbler Layer
In a medium bowl, toss the diced peaches with brown sugar, cinnamon, and cornstarch. Set this mixture aside to allow the flavors to meld.

Step 2: Make the Cake Batter
Preheat your oven to 350°F (175°C) and grease a 10-inch Bundt pan or loaf pan.
In a large bowl, cream the softened butter and granulated sugar until light and fluffy.
Add the eggs one at a time, beating well after each addition, then mix in the vanilla extract.
In a separate bowl, whisk together the flour, baking powder, and salt.
Gradually add the dry ingredients to the wet ingredients, alternating with the milk, and mix until just combined.

Step 3: Assemble the Cake
Pour half of the cake batter into the prepared pan.
Spoon the peach mixture evenly over the batter, spreading it out carefully.
Top with the remaining cake batter, spreading it gently to cover the peaches.

Step 4: Bake to Perfection
Bake the cake for 50-60 minutes, or until a toothpick inserted into the center comes out clean.
Let the cake cool in the pan for 10 minutes, then invert it onto a wire rack to cool completely.

Step 5: Serve and Enjoy
Slice and serve the cake with whipped cream or vanilla ice cream for an extra indulgent treat.