Preheat oven to 300°F. Line two baking pans with silpat mat or parchment paper for easy clean-up.
In a large ziplock bag, add pretzels, olive oil, Ranch dressing mix, and garlic powder.
Shake gently until oil mixture evenly coats pretzels.
Spread pretzels in an even layer on baking trays. Bake for about 15-17 minutes.
Remove from oven and let cool for 5 minutes.