At least, I think it was '50s. I kind of remember seeing it on TV when I was about five in the '60s. I don’t remember much. ISTR that the monsters were kind of like the Horta on Star Trek. They were shaped that way, and they had tentacles. You killed them by bashing their heads/bodies open (with an axe?). Inside it was like they were filled with cooked macaroni.
This might have been a black-and-white '50s horror movie I saw when I was a kid. Or it might have been a B&W dream I had when I was five. Does it sound familiar? Was it a movie, or was it a dream?