By the method of producing popcorn confectionery a first sugar/glucose substance is produced. This substance is boiled at 170 -2100C for approx. 3-10 hours until the substance is dark brown/black and viscous, whereafter it is cooled down. Hereafter a second sugar/glucose substance is produced, which is boiled at 100-1300C for approx. 1-10 hours. The first substance and the second substance are mixed at a weight ratio of 1:2-1:6, whereafter the resulting mixture is boiled and popcorn is added. This mixture can be formed in formed pieces in a machine 1 including a cylindrical, horizontal buffer tank 3, which is surrounded by a chamber 11 filled with oil, and a cylindrical, horizontal main tank 2 surrounded by a chamber 23 filled with oil.