Preheat oven to 350°F.
In a bowl, mix flour, ⅔cup sugar, baking powder, and salt. Mix well. Add milk and egg. Mix until combined.
Add melted butter to a9-inch glass pan. Then, pour batter over melted butter.
Peel and slice peaches then place it in a bowl. Add ⅓ cup of sugar, vanilla extract, cinnamon, and nutmeg. Mix until combined. Lay peach slices on top of the batter in a pan. Sprinkle with light brown sugar.
Bake in the preheated oven for 40-45 min or until brown. Serve with ice cream.