Hey!!! I'm sitting here watching Laverne & Shirley on Pluto TV & there's an episode where they go on a game show. There's a great messy cake scene on it!!! Here's the episode in full on YouTube:

https://youtu.be/kjUKGq-m0cg

It seems like there were some other great WAM moments on this show as well!!!!

R.I.P. David L. Lander, Andrew "Squiggy" Squiggman
1947 June 22 - 2020 December 4
https://www.imdb.com/name/nm0005581/?ref_=tt_cl_t3

R.I.P. Penny Marshall
1943 October 15 - 2018 December 17
https://www.imdb.com/name/nm0001508/?ref_=fn_al_nm_1

Too bad about the quality of the cake and the towel, but here is one-- I always kind a liked Shirley:
https://youtu.be/6mOtZ_tnoxQ