Yup. You’ve got the recipe right, although I never could. Baking is not my best skill. And, I think “over here” must mean Wales. And why do many of we Americans consider our country the center of the universe?
As you likely know, the joke no longer works since the introduction of the “Forever” stamps. If I still sent anything by mail, I would stock up. I think I mailed about two envelopes in the past year or so.
HA! This one took me a few seconds.