Preheat oven to 375 degrees. Blot chickpeas with a paper towel to dry them. In a bowl, toss chickpeas with olive oil and add the chili powder. Season with salt.
Spread on a foil-lined (easy clean up!) baking sheet and bake for 20 minutes, stirring occasionally.
Kick up the heat to 400 degrees and bake for an additional 20 minutes, again - stirring occasionally. Watch carefully the last few minutes to avoid burning.