Preheat oven to 425 degrees F.

Grease and flour a 9 inch square pan.

In a large bowl mix together the flour, baking powder, sugar and salt.

Cut in the shortening with a pastry blender to the size of small peas.

In a separate small bowl, beat the egg well; then stir in the milk and vanilla.

Add the egg-milk mixture to the flour mixture all at once.

Stir carefully until just blended.

Pour batter into prepared pan and spread evenly.

Drizzle top with melted butter.

In a small bowl mix together brown sugar, 2 tablespoons flour and 1/2 teaspoon cinnamon.

Sprinkle on top of cake.

Pour batter into prepared pan.

Bake t 425 degrees F for 15 to 20 minutes, or until a toothpick inserted into the center of the cake comes out clean.