In a large bowl, mix together your cereal and hazelnuts. Set aside.

In a small saucepan, melt together your peanut butter, brown sugar and butter, until slightly boiling.

Pour mixture over your cereal and mix well until everything is well coated.

Place bowl in fridge for ten minutes, so mixture can cool down.

Once cool, pull bowl out of fridge. Stir in Reeses peanut butter cups and M&M's.

Store in air-tight container until you are ready to enjoy your Buckeye Chex Mix!