Season 1, episode 28.
Original air date: 10 April 1953.
Hasty Tasty Pancake Company is offering a double-your-money-back guarantee, so Ricky decides to apply for a refund.
Cast: Ozzie Nelson (Ozzie Nelson), Harriet Hilliard (Harriet Nekson), David Nelson (David Nelson), Ricky Nelson (Ricky Nelson), Don DeFore (Thorny Thornberry), Frank Nelson (A.K. Bailey), Ray Hyke (Mr. Plimmerton), Hal Smith (Mr. Crawford), Vera Marks (Miss Formley) and Sterling Holloway (Groceryman).
From IMDB.

"Ozzie and Harriet" really is about nothing. That's right, Nothing. What's the show about? Nothing! I like the show, It's got that mid-20th Century charm that is often seen in TV shows from back then. BTW, This episode was first broadcast 10 April 1953. Not "edgy", But certainly a lot closer to real-life than say 'I Love Lucy' or 'My Little Margie'.

Ozzie and Harriet, I'm quickly finding out, is really a show about nothing. In this episode, the Harriets get all in a tizzy about the "money-back" label on a pancake mix. The sub-plot... Wait, there IS no sub-plot. They spend 30 minutes on this VERY topic. It's just absolutely AMAZING. I am lapping these episodes up like a dog, because I really find this surreal.