Stir together cereals, nuts and pretzels in slow cooker. Melt butter and add all remaining ingredients. Whir together in a blender until smooth.
Pour the butter mixture over cereal in slow cooker and stir gently until all cereals are coated. Do not cover slow cooker.
Set to high and cook 2 hours, stirring well often, about every 20 or 30 minutes. Reduce heat to low setting and continue to cook for 2 to 6 more hours.
Store in airtight container.
Makes 10 cups.
Submitted by: CM