Please choose the correct solution to the question: make butter in a mason jar

Solution1: Fill a mason jar halfway full of heavy cream. Screw on the lid and shake for 5-7 minutes. Pour off the buttermilk and whats left is butter.

Solution2: Fill a mason jar halfway full of milk chocolate Screw on the lid and shake for 5-7 minutes. Pour off the buttermilk and whats left is butter.

Answer format: solution1/solution2
Answer: solution1