What does “cerrar con broche de oro” mean in Spanish?

In this Mexican cooking video, Janet lists her last ingredient and says “para cerrar con broche de oro, tortillas de harina.” A “broche de oro” is a gold clasp, but the saying just means a perfect finishing touch. She is telling you the flour tortillas are the detail that makes the whole dish complete. When you hear it, picture a speaker saving the best thing for last.

In the clip: “Y, finalmente, para cerrar con broche de oro, tortillas de harina.” — “And, finally, to finish it off perfectly, flour tortillas.” People use this for any strong ending, not only food. “Cerramos la fiesta con broche de oro” = “We ended the party perfectly.” “El cantante cerró con broche de oro” = “The singer finished the show perfectly.” It is warm and a little proud. You often hear it right before the last, best thing — so it signals “here comes the finishing touch.”