Preheat the oven to 300 degrees and line a baking sheet with parchment paper.
Remove the thick stems from the kale and lay the leaves flat on a cutting board. Use a small bat-shaped cookie cutter to cut shapes from the leaves.
Place the cut kale pieces in a large bowl and drizzle with the olive oil. Toss gently until each piece is lightly coated.
Sprinkle the nutritional yeast, garlic powder, and salt over the kale. Toss again until the seasoning sticks evenly to the leaves.
Spread the pieces in a single layer on the prepared baking sheet without overlapping.
Bake for 20 minutes, then check for crisp edges. Cool on the sheet for 5 minutes before serving.