For the crumb topping: Combine the flour, sugar and butter in a bowl. Work the ingredients with your fingers just until the butter is well distributed and resembles a coarse crumb mixture. You can also do this in a food processor. Be careful not to over mix!
For the filling: Preheat the oven to 400 degrees F. Place a baking sheet in the oven to preheat as well; this will catch molasses drips as the pie bakes. Combine the molasses, baking soda and egg in a stainless steel mixing bowl. Whisk until the mixture lightens in color and turns slightly foamy. Add 1 cup hot water and whisk to combine.
In the par-baked pie shell, put approximately half of the crumb mixture on the bottom. Measure out 13 ounces of the wet molasses mixture and carefully pour into the crust (you may have extra wet mixture leftover, which is ok). Put the remaining crumb mixture on the top.
Place the pie on the preheated baking sheet in the oven. Bake 10 minutes. Reduce the temperature to 350 degrees F and bake until the filling doesn't collapse when pressed lightly with your finger, and it is just starting to pull away from crust, 30 to 35 minutes. Do not overbake!
Let cool until set. Serve warm with ice cream or freshly whipped cream!
As a variation, you can substitute 1 cup hot coffee in place of the hot water. Once you try this ratio of crumbs to wet mixture, you can play with the ratio to get a wetter or drier shoofly pie.
This recipe was provided by a chef, restaurant or culinary professional. It has not been tested for home use.
Recipe courtesy of Kimmy Hsieh Tomlinson, Shoofly Pie Company, Seattle, WA