2 (3.29-ounce) bags plain popcorn ▢¾ cup butter ▢⅓ cup white Karo Syrup ▢1½ cup brown sugar ▢¾ teaspoon salt ▢¾ teaspoon baking soda
Make popcorn and place it in a large bowl. Be sure to get rid of all the unpopped kernels.
Using a medium-sized microwave-safe bowl add the butter, brown sugar, syrup, and salt. Heat in the microwave for 2 minutes. Add the baking soda to the melted ingredients. The mixture will foam up. Stir well.
Pour over popcorn and toss together evenly coating all of the pieces.
Place the coated popcorn in the microwave for 1 minute and then stir. Place it back into the microwave and heat for another minute. If you want crunchier popcorn, heat it for another minute.
Allow the popcorn to cool If you used salted popcorn, then reduce or omit the added salt.