Preheat oven to 350°. Butter 8x8 pan.

In a large bowl, stir together 1/2 cup flour, sugars, cinnamon, and salt. Using a fork, stir in the melted butter until mostly combined but still crumbly. Stir in the remaining 1/4 cup flour until the mixture is very crumbly and still has large pieces.

Mix all cake ingredients except flour. After mixed add flour.

Spread batter evenly in pan and sprinkle with crumb topping.

Cook for 30 minutes. If browning too quickly cover with fool.