1/2 stick butter, melted
1 cup sugar
1 cup flour
1 tsp baking powder
Preheat oven to 375 F.
Slice the peaches and discard the pits. Put the peach slices on the bottom of non-stick 9-inch baking pan in a single layer.
In a large bowl, whisk the eggs. Add sugar and butter and stir until combined. Add flour and baking powder and stir until combined.
Pour the batter over the peach slices, so it covers the peach slices. Bake for 35-40 minutes.
Invert the cake before serving so the peaches are on top - either invert the whole cake onto a plate, or slice it first, and invert the individual slices.