Preheat your oven to 350°F. Generously grease a Bundt pan.
Whisk the flour, sugar, baking powder, and salt together in a large bowl.
Add the eggs, butter, sour cream, milk, and vanilla and mix with an electric hand mixer on medium speed until smooth.
Fold in peaches.
Pour the batter into the pan. Bake 40 to 50 minutes or until a toothpick comes out clean.
Cool on a wire rack for 15 minutes. Remove from the pan, place back on the rack, and cool completely.
Prepare frosting by combining the ingredients in a mixing bowl and mixing on low until blended.
Then increase the speed to high and beat for an additional 2-3 minutes until light and fluffy.
Top with frosting before slicing and serving.