Preheat the oven to 350 degrees F and prepare a baking sheet with lightly greased parchment paper.
Remove stems from kale and massage with fingers as you rinse the leaves.
Strain and squeeze kale to remove any excess water or quickly spin in a salad spinner.
In a large mixing bowl, add the basil pesto, lemon juice, and onion powder. Mix until evenly blended together.
Mix in kale leaves and mix all ingredients together using clean hands. Continue to massage kale with ingredients while you mix and rub.
Place kale leaves on the baking sheet, single-layered.
Bake in the oven for 10-15 min per batch. Cooking times may vary due to amount of trays in the oven so use this as a guide and keep a close eye on them so they don't burn.
Store in a cool, dry place or enjoy kale chips right away.
