Preheat oven to 350ºF. Grease a 2-quart or 9" x 9" dish.
In a large bowl combine 3/4 cup of granulated sugar, flour, 1/4 cup cocoa, baking powder and salt. Stir in milk, canola oil and vanilla, blending until smooth.
Pour batter into prepared dish and spread evenly.
In a small bowl, stir remaining 1/2 cup granulated sugar, brown sugar, remaining 1/4 cup cocoa and mix well. Sprinkle mixture evenly over the batter in the dish.
Heat water to just under a simmer and dissolve in the instant coffee. Pour over top of pan - DO NOT STIR OR MIX IN!
Bake 35-40 minutes or until centre is almost set. Remove from oven and let stand for 15 minutes before serving. Make sure you spoon hot fudge sauce from the bottom of pan on to each serving.