“A spoon is just a bowl on a stick” has been cited in print since at least 1995 (“a spoon is a sort of bowl on a stick”). “They’re a bowl on a stick” is a lyric from “The Spoon Song” (2013) by Liam Payne.
     
“A spoon is a bowl on a stick that is used to eat from a larger bowl” was posted on Twitter on June 1, 2014.
   
“A spoon is just a small bowl with a handle” is a similar saying about spoons.
     
         
Google Books
The Subtlety of Sameness:
A Theory and Computer Model of Analogy-making
By Robert Matthew French
Cambridge, MA: MIT Press
1995
Pg. X:
Does Tabletop know that a spoon, with its concavity, is more like a bowl than a knife is? We can see that a spoon is a sort of bowl on a stick, but that is utterly unknown to Tabletop.
 
Google Groups: rec.org.sca
Spoon making
Lyle Gray
4/30/98
(...)
Christian, you wanted an alternative OE word for “a bowl on a stick”, right?  Try “hlaedel” (Modern English “ladle”), from “hladan”.
 
Google Groups: alt.cyberpunk
Spaghetti-O’s
ronin
4/19/99
Brian Pemberton wrote:
> ronin wrote:
> what IS a spoon, anyway?
>
>  A bowl on a stick?
 
a bowl on a stick.  that sounds like a baby’s toy.  is there a ball attached?
 
Google Groups: alt.fan.cecil-adams
Chopsticks
.(JavaScript must be enabled to view this email address)
4/27/99
(...)
Even soup is not eaten with the “spoon” going into the mouth.  The Chinese spoon is actually a small bowl on a stick that is designed to be held to the lips as the soup is poured into the mouth.  Of course, the chinese see nothing wrong with picking up the bowl and going directly from that.
 

bill nails‏
@mr_knute
So, a spoon is just a mini bowl on a stick…hmmm
12:40 PM - 15 Aug 2011
 
Twitter
PlausibleDeniability‏
@Savage__Gambino
A spoon is just a bowl on a stick.
1:19 PM - 18 Jun 2012
 
YouTube
The Spoon Song - Liam Payne (AAoOD2) [with lyrics]
CrazyMusicChannelTV
Published on Mar 19, 2013
1:17
“They’re a bowl on a stick.”
 
Twitter
Anthony‏
@iSpeakComedy
A spoon is nothing more than a mini bowl on a stick
7:56 PM - 6 Aug 2013
 
Twitter
Phred‏
@phredmund
Most distressing thing I’ve read in a long time: “A spoon is a bowl on a stick that is used to eat from a larger bowl.”
11:43 PM - 1 Jun 2014
 
Facebook
Foodbeast
September 15, 2014 ·
A spoon is a small bowl on a stick used to eat from a larger bowl.
   
TrendMantra
15 “Just Like That” Facts About Food
July 29, 2015 Suprita Das
(...)
12)  A spoon is a small bowl on a stick used to eat from a larger bowl.
 
Twitter
Ida Byfuglien‏
@IdaByfuglien
A spoon is just a little bowl on a stick, made to eat from a larger bowl.
3:17 AM - 2 Apr 2016
 
Me.Me
A SPOON IS A SMALL BOWL ON A STICK USED TO EAT FROM A LARGER BOWL MEME
MEMES BOWLING BOWL 🤖 STICKS SPOON STICK ON A STICK SPOONING SPOONS EATES SPOONFUL
FOUND @ 6 LIKES ON 2016-12-14 07:49:44 BY ME.ME
SOURCE: FACEBOOK
 
Reddit—Shower Thoughts
A spoon is just a bowl on a stick
submitted July 27, 2017 by hazardous_panda