For berries:
3 pints blackberries
1 T cornstarch
1/3 to 1/2 cup sugar
1 t vanilla extract
For the topping:
1/2 c flour
1/4 t baking powder
Pinch Salt
8 T unsalted butter
1/2 c sugar
1 large egg yoke (use whole egg if doubling recipe)
1/4 t vanilla extract
Mix flour , baking powder and salt together in a small bowl and set aside. Beat butter and sugar in medium bowl until light and fluffy. Beat in egg yoke and vanilla until smooth. Stir in dry ingredients until just combined.
Pour Berry mixture into a 9-inch deep dish pie plate. Drop the cookie dough topping by heaping tablespoons evenly over the fruit.
Bake until topping is nicely browned and fruit is bubbly, about 40 minutes. Remove from oven and cool for 10 minutes in the pan before serving.




