INGREDIENTS
2 cups
all-purpose flour
1/3 cup
+ 2 TBSP sugar
1 tsp
baking powder
1/4 tsp
baking soda
1/2 tsp
salt
1/2 cup
butter (frozen or very cold)
1/2 cup
sour cream (or plain yogurt)
1
egg (large)
1 tbsp
vanilla extract
1 cup
blackberries (washed and patted dry)
1 cup
powdered sugar
2 tbsp
melted butter
1/2 tsp
vanilla
1 tbsp
milk