Turn your 6 quart slow cooker on high and put your sliced butter (using a silicone slow cooker liner is super helpful!).
Cover and let sit for about 5 minutes so your butter can melt.
Pour in your marshmallows and stir with a wooden spoon until your marshmallows are lightly coated in the melted butter.
Cover and cook for 5 minutes.
Spray your wooden spoon with cooking spray, stir, recover for about 3 minutes and stir until most of the lumps are gone.
Turn off your slow cooker and gradually stir in your pretzel pieces and cereal until everything is well combined.
Spray a 9x13 dish or food storage container with cooking spray and spoon your mixture into the dish/container.
Spray your hands with cooking spray and gently press the mixture down.
Let it sit for about 25 minutes, until it is completely cooled.
About 5 minutes before the treats are cool, pour your chocolate chips in a microwave safe bowl or cup and heat for 30 seconds, stir and repeat until your chocolate is smooth.
Spoon your melted chocolate over the treats.
Cut and serve.
Notes
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As with any of our recipes, carb counts, calorie counts and nutritional information varies greatly. As a result, your nutritional content depends on which products you choose to use when cooking this dish. The auto-calculation is just an automated estimate and should NOT be used for specific dietary needs.
All slow cookers cook differently, so cooking times are always a basic guideline. Recipes should always be tested first in your own slow cooker and time adjusted as needed.