While Mega Stuf Oreo cookies come with extra vanilla creme, Mega Stuf Oreo O's cereal come with marshmallows.
You can find them at Walmart for $3.98 per 16.5-oz box.
As they're just Oreo O's cereal with the addition of marshmallows, you can easily drop some marshmallows onto your regular Oreo O's if you're having trouble finding Mega Stuf Oreo O's.
Photo via Walmart.
