One easy recipe comes from The Food Network's Paula Deen and only requires six ingredients. Another easy-to-follow recipe does not require corn syrup and only takes three ingredients.
To make the Food Network caramel corn, pop 8 cups of plain popcorn. Preheat the oven to 200 degrees Fahrenheit.
Combine 1 cup butter, 2 cups packed brown sugar, 1 teaspoon salt and 1/2 cup light corn syrup in a saucepan. Bring to a boil over medium heat, and let boil for five minutes. Keep stirring the syrup while it boils. After five minutes, remove the pan from the heat, and stir in 1 teaspoon baking soda. Stir well.
Add the popcorn to a large bowl, and pour the caramel over the kernels. Use a wooden spoon to stir the popcorn and ensure it's well-coated with the caramel. Pour the popcorn onto a large roaster pan, and place in the oven. Bake for one hour, using the wooden spoon to stir the popcorn every 15 minutes. Spread the popcorn on waxed paper to cool.
For caramel corn that doesn't require using corn syrup, pop 3 quarts of plain popcorn. Cream 1/2 cup softened butter with 1/2 cup firmly packed brown sugar. Whip until the butter is fluffy. Combine the popcorn with the butter mixture, stirring well to coat. Pour onto a roasting pan, and bake at 350 degrees for eight minutes.