Preheat oven to 350ºF/180ºC. Grease a muffin pan or line with muffin liners. Set aside.
In a large bowl whisk together flour, baking powder, and cinnamon. Set aside.
In a medium bowl whisk together eggs and sugar until well combined. whisk it melted butter, heavy cream, and vanilla extract, until combined. Stir in Peaches.