Combine all ingredients together in a blender, blend until smooth. Poor into a pot (or baking dish) and cook (or bake at 300°F) stirring occasionally, until butter “sheets” from a spoon (comes off in clumps, not slides off in a stream) and, when a small amount is put on a plate no rim of liquid separates around the edge of the butter.
Pour while hot into hot, sterilized jars, leaving 1/4” head space; adjust caps.
Process pints and quarts 10 minutes in boiling water bath.
Keyword Apple | ball blue book | Butter | edstrom | jean | pear