Baked Sweet Potato Chips Heat oven to 350 F. Peel sweet potato (works with yams too) and slice thin, as if for a thick potato chip. Cover a cookie sheet or baking pan with foil, sprayed lightly with vegetable spray. Lay sweet potato chips on the foil, rubbing each one slightly in the veggie spray. Then lightly spray the tops with veggie spray, sprinkle with your favorite spice (I use garlic salt or something called crazy salt). Bake for 20 minutes, turn, sprinkle that side, and bake for another 10 minutes. Make a lot, because EVERYONE including small children, SO's and teenagers who usually stick up their noses at healthy food, tend to like these. Hope this helps!