Lightly oil an 8 inch square baking pan or spray with a nonstick cooking spray.
Combine topping ingredients in a small bowl or custard cup. Set aside.
In a large bowl, sift together cornmeal, flour, baking powder, cinnamon and salt.
In a blender container, combine remaining cake ingredients. Blend until almost smooth. Add to dry mixture. Mix until all ingredients are moistened. Spoon into prepared pan. Sprinkle topping evenly over cake.
Bake 35 minutes, until a toothpick inserted in the center of the cake comes out clean. Cool in pan on a wire rack.