Corn mush (i.e. cornmeal mush)?

You must not be shopping at the right location.

From Pages One & Two...It's Not:

Cat Manure
Cheesey Macaroni
Creamy Margerine
custard mix
cake mix
Chocolate Milk
Corn meal
Chex Mix
Corn muffins
curry marmalade
Cosmo magazine
Cream of mushroom
coconut macaroons
chocolate milk
cantaloupe melons
Chocolate Marshmallows
chocolate mousse
Carrot Marmalade
Crushed Marjoram

That's a fine guess, but that's not it.

No. Furthermore, it is no kind of "mush" ...

How about a hint, is it produce, meat, dairy, general dry goods, frozen, health and beauty cares?

I have to go home. You guys better figure this out tonight, it's gonna drive me crazy. I worked in a grocery store for like, 7 years. I am mentally walking up and down the aisles. Grrrr.

Captain Morgan?

Nevermind, that's a brand. damn it.

I GOT IT:

Condensed milk?

Carmen Miranda?

"C M" is one that my 12-year-old brother did! Ha ha ha! He told us: "it's a breakfast food" ...

No, but I like where you're goin' with that!

Good one! That's not it!

Cocoa Mix?
Canned Milk?

Breakfast food? I got it! Chipotle Mayonnaise!

No, No.

Chipotle Mayo?! I wish it had been that.

Cinnamon Muesli?

No.

Canned Meat :greenface

I give up. Tell us what it is!