Preheat oven to 400 degrees. Mix together the crumb topping ingredients: flour, brown sugar, and coconut oil until pea-sized crumbs form. Set aside.
Mix together molasses, corn syrup, brown sugar and eggs until smooth.
Dissolve baking soda in hot water. Slowly pour into the molasses mixture and stir until combined. Mix will be runny.
Pour half of syrup into an unbaked pie shell, top with half of crumb mixture, then rest of syrup, finishing with crumbs on top. Bake at 400 degrees for 10 minutes, then at 350 for 40-50 minutes until set. Best served warm or cold with milk.