110 oz bagdark chocolate chips, divided(I used Ghirardelli 60% grands baking chips)
1/2cuplight corn syrup
2tbspsalted or unsalted butter
1/2cupcreamy peanut butter
1tspvanilla extract
1/4cuppeanut butter chips
3cupsmini marshmallows(make sure they're not sticky/clumpy)
Reese's cups, chopped(use minis, thins, regular, whatever floats your boat! I used 9 miniature Reese's stuffed with pieces for one batch and 7 Reese's thins for another.)
Instructions
Line a 9x13 pan with parchment and give it a light spray with cooking spray.
Place the cereal in a large bowl, big enough for you to comfortably mix in.
Set aside 1/4 cup of the chocolate chips for mixing in at the end (or don't!).
Combine the butter, peanut butter, corn syrup, and remaining chocolate in a small sauce pan and melt together over medium heat, stirring regularly. You could also microwave them in 30 second intervals in a heatproof bowl until melted, stirring after each round.
Once completely melted and smooth, remove from the heat and stir in the vanilla extract.
Pour over the cereal and stir to evenly coat.
Fold in mini marshmallows, peanut butter chips, and chocolate chips.
Press into prepared pan. Don't be gentle, really smoosh it all in there.
Sprinkle chopped peanut butter cups evenly across the top and press them down to adhere.
Let sit for a couple of hours before you remove from pan and slice into 18 bars (3 bars on the short side, 6 on the long side).
Notes
I highly recommend using the Ghirardelli Grands baking chips, at least for the mix-in portion because the larger size provides a really nice texture contrast next to the cereal and mallows!