Ingredients 

• 1 cup all purpose flour  
• 2 teaspoons cocoa powder
• 1/4 teaspoon salt
• 2 teaspoons baking powder
• 2 teaspoons canola oil
• 3/4 cup granulated sugar
• 1/2 cup milk
• 1 teaspoon vanilla extract
• 1 cup chopped walnuts optional
• 1 cup brown sugar
• 1/4 cup cocoa powder
• 1 1/3 cup hot water

Instructions 

• Preheat the oven to 350 degrees.
• Spray the inside of an 8×8 baking pan with cooking spray.
• In a bowl, whisk together the flour, cocoa powder, salt and baking powder.
• Add the oil, sugar, milk and vanilla. Mix well.
• Fold in the chopped nuts if desired.
• Pour the batter into the prepared pan.
• Sprinkle the brown sugar over the cake batter.
• Sprinkle the cocoa powder over the brown sugar.
• Pour hot water evenly overtop the cake batter.
• Bake in preheated oven for 40 minutes.
• Serve warm with ice cream.