Fluffy Confetti Birthday Cake with Cream Cheese Frosting

1. Cream the softened butter with sugar until fluffy

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

3. Add the sour cream, lemon zest, and vanilla sugar and mix until combined

4. Whisk together the flour, baking powder, and baking soda in a separate bowl

5. Sift the dry ingredients into the batter and mix well

6. Gently fold in the sprinkles by hand

7. Preheat the oven to 180°C (conventional) or 160°C (convection)

8. Line a 35x24 cm baking pan with parchment paper

9. Pour the batter into the pan and bake for 30 minutes

10. Let the cake cool completely in the pan

11. Cream the softened butter for the frosting until smooth

12. Gradually add the powdered sugar in three batches, beating well after each addition

13. Beat the cream cheese until smooth in a separate bowl

14. Gradually beat in about 2 tablespoons of the butter mixture to temper

15. Add the vanilla extract and beat until smooth

16. Spread the frosting over the cooled cake with an offset spatula

17. Decorate with sprinkles

Notes

1. This cake yields about 24 servings