1. Preheat Oven:
Preheat oven to 350°F (175°C). Grease and flour a bundt pan thoroughly.

2. Mix Dry Ingredients:
In a medium bowl, whisk together flour, baking powder, baking soda, and salt.

3. Cream Butter and Sugar:
In a large bowl, beat softened butter and sugar until light and fluffy.

4. Add Eggs & Vanilla:
Add eggs one at a time, beating well after each addition. Stir in vanilla extract.

5. Combine with Sour Cream and Dry Ingredients:
Alternately add dry ingredients and sour cream to the butter mixture, beginning and ending with dry ingredients. Mix until just combined.

6. Fold in Peaches:
Gently fold diced peaches into the batter.

7. Bake:
Pour batter into prepared bundt pan. Bake for 50-60 minutes or until a toothpick inserted into the center comes out clean.

8. Cool and Glaze:
Let cake cool in pan for 15 minutes, then invert onto a wire rack to cool completely. Mix glaze ingredients until smooth and drizzle over cooled cake, if desired.