Creating Peach Upside Down Mini Cakes is a straightforward process. Follow these simple steps to ensure success:

1. Preheat the Oven: Preheat your oven to 350°F (175°C). Grease a muffin tin with cooking spray or butter.

2. Prepare Caramel Sauce: In a small saucepan, combine brown sugar and water. Cook over medium heat until the sugar dissolves and the mixture begins to bubble. Remove from heat.

3. Arrange Peaches: Pour a small amount of the caramel sauce into each muffin cup. Place a few slices of peach on top of the caramel.

4. Mix Dry Ingredients: In a medium bowl, whisk together flour, granulated sugar, baking powder, baking soda, and salt.

5. Combine Wet Ingredients: In another bowl, mix the melted butter, eggs, and vanilla extract until well combined.

6. Combine Mixtures: Gradually add the wet ingredients to the dry ingredients, stirring until just combined. Be careful not to overmix.

7. Fill Muffin Cups: Spoon the batter over the peaches in each muffin cup, filling them about 2/3 full.

8. Bake: Place the muffin tin in the preheated oven and bake for 25-30 minutes or until a toothpick inserted in the center comes out clean.

9. Cool: Remove the muffin tin from the oven and allow the mini cakes to cool for about 10-15 minutes.

10. Invert Cakes: Carefully run a knife around the edges of each mini cake. Invert the muffin tin onto a plate to release the cakes, allowing the caramelized peaches to be on top.