"Grab a cup of coffee!..."
frozen unsalted butter
cake flour
all-purpose flour, plus more
for dusting
granulated sugar
baking powder
salt
baking soda
heavy cream, plus more
for brushing
crème fraîche
frozen blueberries (about 5 ounces)
powdered sugar
milk
vanilla bean paste
unsalted butter, melted
Pinch of salt
pearl sugar