Cut russet potatoes into thin slices (see pictures for size)

Cover a large baking sheet with parchment paper, cut to fit the size of the pan

Place potato slices on the parchment paper

Using a rubber brush, spread a thin layer of olive oil over both sides of the potato slices

Combine salt, pepper, garlic powder, onion powder, cumin, and chili powder in a small cup or bowl

sprinkle mixture evenly over potatoes, flipping potatoes, to cover both sides

Bake at 450 degrees for 25-35 minutes, flipping halfway through, until crispy

Serve with ketchup and enjoy!