Preheat oven to 350 F.
Melt butter in a small saucepan on the stove. Don’t use the microwave. It’s too easy to ruin the butter. When melted, pour into the bottom of a heavy 9x13 inch baking pan.
In a large bowl, whisk together flour, baking powder, salt, egg, milk and vanilla to create a batter.
Pour batter evenly over the melted butter.
In a different bowl, combine peaches, sugar, cinnamon and nutmeg.
Spread peaches over batter. DO NOT STIR!
Bake 40-45 minutes until batter rises to the top and is golden brown.