Pour desired amounts of heavy cream in a blender and blend till its thick and creamy and buttermilk is formed around it and butter is moldable.

Strain well pressing down on it and save buttermilk if desired

Rinse butter with very cold water and press with a spoon when draining it making sure to drain it well and then mix is some salt 1/4 teaspoon to a pint of cream is what i use. You can add more or leave it out. You can mix in some cinnamon, honey, garlic powder, tad of extra salt, pepper, grated parmesan cheese or parsley, make it sweet or savory !

Sometimes I like a spreadable butter. After the butter is made I'll drizzle in some grapeseed oil maybe like a cup to a pint of made butter and blend till its thinned out and smooth adding in a dash of extra salt. It will look very runny but it will firm up in the refrigerator.

Store in the refrigerator in a jar or roll into a log in plastic wrap