Grammy's Shoofly Pie

Step 1 -Roll the dough to fit a 9-inch pie plate.

Step 2 -Trim and flute the edges of the dough on the pie plate.

Step 3 -Refrigerate the pie plate for 30 minutes.

Step 4 -Preheat the oven to 425 degrees F.

Step 5 -Mix the 1/2 cup of the brown sugar, the molasses, the egg, the 1 1/2 teaspoons of the flour, and the 1/2 teaspoon of the baking soda together.

Step 6 -Slowly stir in the boiling water, allowing it to cool completely.

Step 7 -Line the crust with foil and fill it with pie weights like dried beans or rice.

Step 8 -Blind bake the crust on the lower rack for 15 minutes.

Step 9 -Remove the foil and weights.

Step 10 -Brush the crust with the egg yolk.

Step 11 -Bake the crust for 5 minutes.

Step 12 -Allow the crust to cool on a rack.

Step 13 -Reduce the oven heat to 350 degrees F.

Step 14 -Whisk together the remaining flour, the remaining brown sugar, the remaining baking soda, and the salt in a bowl.

Step 15 -Cut in the butter until the mixture is crumbly, making sure the butter stays as cold as possible.

Step 16 -Add the filling to the crust.

Step 17 -Sprinkle the topping evenly over the filling.

Step 18 -Cover the edges of the pie with foil before placing it in the oven.

Step 19 -Bake until the filling is set and golden brown, about 45-50 minutes.

Step 20 -Cool the pie on a rack.

Step 21 -Serve!