I'm not a fan of leftovers... period. Whether it be take-out, homemade meals, or remaining ingredients in cooking/baking e.g. remaining 1/2c heavy cream, 1/4tsp butter, 1c chocolate chips.
Yeah, I can keep things in the fridge/pantry until the next time I'll consume them, but honestly... I won't. So why waste the space and mental consciousness.
Recipes I've looked up precisely tell you how much of whatever cup-wise you'll need. I am over that... especially for marshmallow treats.
No-Leftovers Lucky Charms Marshmallow Treats
1 bag (160z) mini marshmallows
1 bag (the 14-15 oz size) Lucky Charms cereal
1 stick (1/2c) butter
Melt butter in large pot. Add marshmallows to melt.
Then dump in cereal. Stir and mix until evenly coated.
Scrape the mixture into a parchment lined 9x13 pan (excess hanging over edges for easy removal). Press firmly down and into corners. Let cool and harden.
Cut into square or whatever to share!