INGREDIENTS
1 1/2 cups
all-purpose flour
3/4 cup
sugar
salt
Zest of half a lemon
3/4 cup
unsalted butter, cold
2
large eggs
1 cup
sugar
1/2 cup
sour cream or greek yogurt
6 tbsp
all-purpose flour
salt
Juice of half a lemon
1 tsp
vanilla extract
15 oz
blackberries, fresh or frozen (thawed and drained of excess juices)