Preheat oven to 400 degrees F (200 degrees C).

Prepare two unbaked pie crusts.

In a bowl, mix flour, brown sugar, lard, nutmeg (optional), and cinnamon (optional) until crumbs form.

In a separate bowl, whisk together molasses, brown sugar, eggs, and warm water.

Dissolve baking soda in the molasses mixture.

Pour half of the molasses mixture into one pie crust.

Sprinkle half of the crumb mixture over the molasses filling.

Repeat the process with the remaining molasses and crumb mixtures in the second pie crust.

Bake at 400 degrees F (200 degrees C) for 10 minutes.

Reduce heat to 350 degrees F (175 degrees C) and continue baking for 50 minutes, or until the filling is set.

Let cool completely before serving.