Preheat the oven to 325 degrees F (165 degrees C). Line 2 baking sheets with parchment paper.

Combine olive oil, vinegar, garlic powder, salt, and pepper in a bowl. Add leaves and toss until well combined. Lay the leaves in a single layer on the prepared baking sheets and drizzle with remaining olive oil mixture.

Bake in the preheated oven until dandelion chips are crisp, making sure they do not burn, 12 to 16 minutes. Leaves will stiffen as they cool.