1 c. light corn syrup
1 c. sugar
1 c. creamy peanut butter
1 tsp. vanilla extract
6 c. Corn Flakes cereal
1 1/2 c. M&M's, divided
Combine corn syrup and sugar in a large saucepan over medium-low heat. Stir frequently until sugar is dissolved, then increase heat to medium and bring to a boil. As soon as mixture comes to a boil, remove from heat and stir in the peanut butter and vanilla extract. Then, stir in the cereal until all of the cereal is coated in the creamy mixture. Last, stir in one cup of the M&M's.
Drop heaping spoonfuls of cereal mixture onto wax/parchment paper and press a few M&M's onto the top of each cookie. You can press the cereal together to help form a uniform shape. Allow to set and serve.