Preheat your oven to 350°F (175°C) and prepare a 9x5 inch loaf pan with parchment paper.

Sift together cake flour, baking powder, and salt in a bowl and set aside.

In a large bowl, cream butter, white sugar, and brown sugar until light and fluffy.

Add eggs one at a time, mixing well after each addition.

Stir in vanilla extract and milk until just combined.

Gently fold in the dry ingredients until just combined.

Pour batter into prepared pan and bake for about 60 minutes, until a toothpick comes out clean.

Cool in the pan for 15-20 minutes, then transfer to a wire rack to cool completely.

Whisk together powdered sugar, milk, and vanilla extract to make the glaze, then drizzle over cooled cake.

Decorate with sprinkles while the glaze is wet.