Excellent Birthday Cake

Name: Birthday Cake
Ingredients: 2 cups (300 g) all-purpose flour; 2 tbsp (20 g) corn starch; 1 1/2 tsp baking powder; 1 tsp salt; 1/3 cup (65 g) sprinkles; 1 cup (250 g) unsalted butter; 1 1/2 cups (315 g) caster sugar; 3 large eggs; 1 tbsp vanilla extract; 1 cup (250 ml) milk; 2 cups (500 g) unsalted butter, softened; 1 tsp salt; 1/4 cup (60 g) sour cream; 3 cups (450 g) powdered sugar; 1 tsp vanilla extract; 1 cup (200 g) dark chocolate, melted; 1/2 cup (50 g) cocoa powder; 2 drops pink food gel; 1/3 cup (65 g) sprinkles

Excellent moist birthday cake with sprinkles.

If you're not into the whole brevity thing