1 Preheat oven to 120 ° C.

2 Combine salt, butter, syrup and brown sugar in a bowl and heat the mixture.

3 Pour the popcorn into a large bowl.

4 Sprinkle two baking sheets using cooking spray.

5 Stir constantly until the liquid is smooth and bubbles begin to appear on the surface.

6 Slowly pour the mixture over the popcorn, stirring constantly. The liquid should cover the entire popcorn evenly.

7 Place the popcorn on a baking sheet. Spread out so that it cooks evenly.

8 Cook for 1 hour, stirring every 10 minutes.

9 Refrigerate before serving.