1. In mixing bowl, combine sugar and cinnamon. Cut in margarine. Add crushed cereal or crumbs and nuts. Mix until combined.
2. Prepare cake mix according to package directions.
3. Sprinkle half of cereal mixture over bottom of 3.5 L (13 x 9") baking pan coated with cooking spray. Spread batter evenly over cereal mixture. Sprinkle with drained blueberries and remaining cereal mixture, pressing lightly into cake batter.
4. Bake at 180°C (350°F) 35-40 minutes or until wooden pick inserted near centre comes out clean. Cut into squares. Serve warm or cold.
In keeping with good allergy practices, we remind you to be aware of allergens and to check labels on any packaged goods used. This recipe has been tested using Kellogg's* products. Results with other products may vary.