To a large bowl, add blackberries, sugar, cornstarch, sugar, water, cinnamon, lemon juice, and lemon zest. Mix and add to a 9”x13” baking dish.
In a separate bowl combine the flour, sugar, salt, and baking powder.
Cube up the butter and add it to the dry mix. Incorporate lightly using a fork or pastry cutter.
Preheat the oven to 350°F.
In a small bowl, whisk together the egg and half and half.
Create a well in the center of the dry ingredients and pour in the wet ingredients. Mix until incorporated.
Spray an ice cream scoop with no stick and begin adding scoops of the biscuit mixture to the blackberries. Once all the biscuit toppings is used, you are ready to bake!
Add the baking dish to the oven and bake for 30-35 minutes, or until the biscuits are golden-brown.
Let the cobbler cool out of the oven for 15 minutes before digging in.
Top with ice cream, serve, and enjoy!