Preheat oven to 350°F (175°C) and grease a 9x9 inch pan.

In a large bowl, mix flour, granulated sugar, baking soda, baking powder, salt, and cinnamon.

Add melted butter, sour cream, egg, and vanilla extract; mix well with a mixer until combined.

Pour batter into the prepared pan.

In a separate bowl, combine brown sugar, flour, and shortening until it forms coarse crumbs.

Set aside 1 cup of the crumb mixture.

In a small bowl, dissolve baking soda in hot coffee, then add to the remaining crumb mixture along with egg and vanilla; stir until just combined.

Sprinkle the crumb topping evenly over the batter.

Bake for 30-35 minutes, or until a toothpick inserted into the center comes out clean.

Cool in the pan for 15-20 minutes before slicing and serving.