Beat butter, 1/2 cup sugar, 1 egg, flour, baking powder, and milk in small bowl using an electric mixer for a few minutes or until smooth and changed in color.
Pour into greased 8 x 8 microwave-safe baking dish.
Top with peaches.
Microwave on high for 8 minutes.
Mix heavy whipping cream and two eggs until combined.
Pour over the peaches.
Sprinkle with cinnamon and two teaspoons of sugar.