INGREDIENTS
3 cups
all-purpose flour
1 1/2 cups
sugar, divided
1 tsp
baking powder
1 tsp
cinnamon
1/4 tsp
salt
Zest and juice of one lemon, divided
1 cup
cold unsalted butter, cut into 1 inch slices
1
large egg
2 tsp
vanilla extract
4 cups
fresh blackberries
4 tsp
cornstarch