Pioneer Woman's Mystery Mocha

I got this off of Pioneer Woman's website. She only makes wonderful, to die for, food.

• Ready In: 1 hr
• Serves: 8
• Yields: 8 squares

Ingredients

• 3⁄4 cup granulated sugar
• 1  cup all-purpose flour, sifted
• 2  teaspoons baking powder
• 1⁄8 teaspoon salt
• 1  ounce  unsweetend chocolate (1 square)
• 2  tablespoons butter
• 1⁄2 cup  whole milk
• 1  teaspoon vanilla extract
• 1⁄2 cup brown sugar
• 1⁄2 cup granulated sugar (additional)
• 4  tablespoons  powdered  cocoa (Not Drink Mix)
• 1  cup  cold  strong coffee

Directions

1. Sift together 3/4 cup sugar, flour, baking powder, and salt. Set aside.
2. Melt square of unsweetened chocolate and butter in the microwave. Add to dry ingredients alternately with the milk and vanilla. Blend. Pour into a greased 8×8 pan.
3. Combine brown sugar, the 1/2 cup additional granulated sugar and cocoa powder. Sprinkle over the cake batter. Pour the one cup COLD coffee on top. This will look TERRIBLE. Bake 350 degrees for 40 minutes.
4. Serve warm with ice cream or sweetened whip cream or whipped topping. This will serve 8. In a 9×9 square pan, you can cut 9 pieces. Best served warm.