Wet Bottom Shoo Fly Pie

Makes two 9-inch pies.

Crumb Mixture:
2 1/2 cups all-purpose flour
1 teaspoon salt
1 teaspoon baking powder
1/2 cup shortening
1 cup brown sugar

Bottom:
1 cup hot water
1 cup brown sugar
1 cup molasses
1 teaspoon baking soda dissolved in 1 teaspoon vinegar

Mix crumb mixture ingredients together. Blend bottom ingredients together. Line 2 pie pans evenly with liquid, and cover with crumbs. Bake at 425 degrees F for 15 minutes, and then at 350 degrees F until done.