Creating these delicious Peach Upside Down Mini Cakes can be straightforward if you follow these simple steps:

1. Preheat Oven: Preheat your oven to 350°F (175°C). Prepare a muffin tin by greasing the cups or lining them with paper liners.
2. Prepare Peaches: If using fresh peaches, peel and slice them. If you have canned peaches, drain them well.
3. Make Caramel: In a saucepan, melt 2 tablespoons of butter over medium heat. Stir in the brown sugar and mix until fully combined and slightly bubbly.
4. Caramelize Peaches: Spread the caramel mixture evenly in the bottom of each muffin cup. Arrange a slice of peach in each cup, ensuring to cover the caramel.
5. Mix Dry Ingredients: In a large bowl, whisk together the flour, granulated sugar, baking powder, baking soda, and salt until well combined.
6. Mix Wet Ingredients: In another bowl, blend the melted butter, egg, vanilla, and buttermilk, whisking until mixed smoothly.
7. Combine Mixtures: Gradually add the wet ingredients to the dry ingredients, stirring until just combined. Be careful not to overmix; a few lumps are okay.
8. Fill Muffin Cups: Spoon the batter over the peaches in each muffin cup, filling each about two-thirds full.
9. Bake: Place in the preheated oven and bake for 20-25 minutes, or until a toothpick inserted into the center comes out clean.
10. Cool: Remove from the oven and let the mini cakes cool in the pan for about 10 minutes. Then, carefully flip them onto a wire rack to cool completely.

With these steps, you are ready to indulge in delicious Peach Upside Down Mini Cakes!