INGREDIENTS
1
Egg plus 1 yolk, large
3/4 tsp
Baking powder
1/4 tsp
Baking soda
1 cup
Cake flour
1 1/2 tsp
Poppy seeds
1/4 tsp
Salt
1/2 cup
Sugar
1/4 tsp
Vanilla bean paste or vanilla extract
6 tbsp
Butter, unsalted
1/2 cup
Sour cream, whole or low-fat
1 tablespoon juice from zested orange