Pour all the crackers, chips, and pretzels into a very large bowl or garbage bag. Stir or shake to combine.
Mix together popcorn oil and garlic powder. Pour over snack mix and stir/shake well.
Pour snack mix into single layers onto large baking sheets or roasting pans.
Bake at 225°F for 1 hour, stirring every 20 minutes.
Allow party mix to cool, then store into airtight containers or Ziploc bags.
Freezer Friendly! Store extra of this party mix in freezer Ziploc bags. Stays fresh in your freezer for a few months.
Mix and Match: Mix and match your favorite crackers and chips. This recipe just needs 7 to 8 bags or boxes of your favorite snacks. In addition to those listed above I have used Wheat Thins, Cheez-Its, Funyons, and Munch-'ems.