Preheat the oven to 375 degrees F (190 degrees C). Grease a 13x9-inch pan.

Combine 1 cup sugar, flour, baking powder, salt, ground cinnamon, shortening, and egg. The dough will be crumbly. Pat half of the dough into the prepared pan.

Combine remaining 1/2 cup sugar, cornstarch, and berries. Place mixture over dough in pan. Crumble the remaining dough over the tops of the berries.

Bake in the preheated oven until top is slightly browned, about 45 minutes.