Preheat oven to 300oF. Line two baking trays with silpat mat or parchment paper for easy cleanup.
In a large resealable 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.
Store pretzels in an airtight container at room temperature for up to 3 weeks. Enjoy!