You have used marshmallow as a mire. Shiny strawberry cream as a slime/glue? Pastiche as encasement? Lakes of fruit juice, forests of formed, solid meringue? Dungeons of hard candy?

Oh he is CUTE!

Sink him in some red velvet cake Frosting, or some thick chocolate frosting perhaps!

Jello gelatinous cubes!

Gum is always a fun one.
I've also seen some smores themed bondage that can also be fun with the mix of marshmallow + chocolate.
Pouring liquid chocolate on a character only for it to harden as it cools and encase them.
Ramen or spaghetti noodles as bondage? Tentacle-esque noodles maybe?
Flan or jello as a food version of slime.
Trapped inside a latticed pie, maybe the filling is really deep?
There's potential for uncooked bread dough.

How about some cold an simple like ice cream

strawberry vines could work, green contrasts nicely against red, except with his dashes of white it can turn a bit christmas-y in my minds eye i could imagine if you put the light so the green colors bounces on him that would make it less so. but not sure. You could make the strawberries more pink, or if you make his outfit a slight shade darker some real bright red vibrant strawberries would contrast nicely to the darker tones.

most of what comes to mind is more food themed, but not to a food themed world... the whole franchise was never big here. If you wanna keep it within a worlds limits, i'd say things are really flexible. My first thought was a red velvet cake hill landslide, so layers of cake getting rolled over the character, stuck between the layers of the "cake", so clearly mushed in there, with a lot of weight but not in mortal peril. But then i thought at that point why not just foodify any scenario. chu like drawing spiders, why not like a cute spider that mimics a strawberry, and the webbings are like sticky and sugary.

general foodstuff; character being the filling of a dessert, so in process of being covered with icing, or bits of them poking out of the finished dessert. or being stuck in a glass jar that is filled w some jelly or such, and the lid is looming in the distance as a threat. If you want a mirror to the other piece, having the peril come from above seems fun to me, he's in a bowl, maybe covered in strawberries so he cant rly move and we see cream being pored into the bowl, so its sorta a drowning peril.

the suggestions posted by the others are fun too. happy drawin' !

How about some sort of 'sinking' but its dough proofing, so it's 'rising' up and around the particular victim? :O