-
Spray a 6 quart slow cooker with non stick cooking spray.
-
Add cereals, peanuts and pretzels.
-
In a small bowl, combine butter, brown sugar, syrup, vanilla extract and cinnamon.
-
Pour butter mixture over cereal mixture and gently stir to combine.
-
Cook, uncovered in slow cooker, on high for 1.5 hours. Stir gently every 30 minutes, making sure to stir from the bottom of the slow cooker.
-
Change heat setting to low and let cook another 20 minutes, stirring one more time halfway through.
-
Transfer to a parchment paper lined baking sheet and let cool.
-
Sprinkle in M&M'S once cool and serve.