Preheat oven to 375 degrees.
In a saucepan, combine the berries, sugar, and cornstarch. Cook over medium-high heat until thick and bubbly, stirring regularly.
Pour into 3 qt casserole dish.
In a separate bowl, make the doughy crust. Combine flour, 1/4 c sugar, baking powder, and salt.
Cut in butter.
Add milk and eggs, and stir just to combine.
Drop dough by spoonfuls on berries. (It will expand as it bakes.)
Bake for 30 minutes or until thick and bubbly. Check dough for doneness with a toothpick.