how do you make buttermilk

{"cid":"91165909","title":"Butter Wrapping Machine \/ Buttermilk Making Machine For Butter Making Process","imgUrl":"https:\/\/img.chinax.com\/nimg\/86\/b6\/1839fa8772ddd09756dc4f8eee79-200x200-1.jpg","attrs":{"Price":"USD100000-150000\/Set","Brand Name":"Shanghai Beyond","Model Number":"BY-BL","Minimum Order Quantity":"1set","Delivery Time":"60-100 working days upon receipt of payment and confirmed the drawings","Certification":"ISO9001\/CE\/SGS","Place of Origin":"China","Supply Ability":"50sets\/Year","Packaging Details":"Export standard package","Raw material":"Fresh cow milk, buffalo milk, goat milk, camel milk or milk powder, or both mixed","Shelf life":"60days-360days","Package for end product":"plastic bag, plastic container, vacuum package or others","Warranty":"12 months after commissioning","After sales service":"Engineers available to service machinery overseas"}}

{"cid":"91221349","title":"Stirring Function Butter Churning Machine for 200L-1500L Milk Butter Making Business","imgUrl":"https:\/\/img.chinax.com\/nimg\/2d\/1f\/0d38e89ed2225fd6c622e2fe6d5a-200x200-1.jpg","attrs":{"Price":"$3,500.00\/sets 1-1 sets","Brand Name":"NC, NC","Minimum Order Quantity":"1 set","Applicable Industries":"Manufacturing Plant, Food & Beverage Factory, Farms, BUTTER CHURNER PROCESSING lINE","Showroom Location":"Romania, Bangladesh, Kazakhstan, Tajikistan","Video outgoing-inspection":"Provided","Machinery Test Report":"Provided","Marketing Type":"HOT SALE 2022","Warranty of core components":"1 Year","Core Components":"Engine, Bearing, Pressure vessel, Gear","Condition":"New","Place of Origin":"Shanghai, China","Voltage":"220V\/380V","Weight":"200 KG","Dimension(L*W*H)":"Customized","Warranty":"1 Year","Key Selling Points":"Famous brand PLC","Material":"SUS304\/316L","Certification":"ISO9001","End product":"Butter","Name":"Butter Churner","Function":"Stirring","Application":"butter,milk","Packaging Details":"Standard export wooden case","Port":"Shanghai","Supply Ability":"800 Set\/Sets per Month"}}