• Combine brown sugar and cinnamon in a large resealable bag.
• Add the pineapple spears and close the bag tightly.
• Shake it so that the cinnamon and brown sugar completely coat the spears. Press sugar mixture onto spears as you remove from bag.
• Preheat oven to 400 degrees. Prepare a rimmed baking sheet with tin foil and a light coating of cooking spray. Set aside.
• Place coated pineapple on prepared baking sheet in a single layer. Place tiny butter cubes across the top of the pineapple spears.

Source: kitchendivas.com