Grease 9X13 pan or a pan of your choosing and spray with non-stick cooking spray. I thought it would be fun to make this look like a tiered cake (something different). Add margarine, light corn syrup, white chocolate chips, and 11 oz. of marshmallows to a microwave safe bowl. Microwave 2-3 minutes until melted, stirring every 30 seconds. Add the cereal to the mixture and then add the additional marshmallows and cinnamon chips. Press into prepared pan.