Line a 9x13 inch baking pan with parchment paper or grease well and set to the side.
Mix the Rice Krispies and Cocoa Pebbles in a large, heat-safe bowl and set aside for now.
4 cups Rice Krispies, 4 cups Cocoa Pebbles
Melt the salted butter and 6 cups of mini marshmallows in a large saucepan over low to medium-low heat, stirring constantly. Be sure the butter is put in the pan first, and do not increase the heat beyond medium-low.
¼ cup (½ stick) salted butter, 8 cups mini-marshmallows
Stir and heat for 5 minutes or until almost completely melted and smooth.
Add 1 ½ cups of chocolate chips and the sea salt. Continue cooking and stirring for about 2 more minutes until everything is melted and combined.
½ teaspoon sea salt, 2 cups semi-sweet chocolate chips
Pour the chocolate marshmallow mixture over the Rice Krispies and cocoa pebbles and gently fold together until completely combined. After the chocolate is cool to the touch, you should use your hands to finish mixing the treats, as it is easier to get an even mixture with your hands than with a spoon.
Once the treats are well mixed and cooled slightly, sprinkle in 2 cups of the remaining mini-marshmallows and the remaining ½ cup of chocolate chips and gently distribute throughout the treats.
Press everything into the prepared baking pan and allow the chocolate rice krispie treats to cool completely, about 30-60 minutes, before cutting into squares and serving.
Notes
Storage:
To Store: Store these treats, in a covered container, in the refrigerator for up to one week, or on the counter for up to 4 days.
Tips:
Do not add any more chocolate chips than what’s mentioned in the recipe or it will make the treats way too hard and difficult to bite.
Move quickly when going through the steps as you want your marshmallow to stay hot and easily stirrable.
I think the treats do best when left overnight. However, if you need to hurry things along, they should be fine within a couple hours, or once they’ve cooled.
If you want to use a 9x13 pan, simply double the recipe or you’ll get thinner rice krispie treats.
Be sure to press down on the sprinkles once you add them so they stick to the treats as they dry and don’t just fall off.
If you are storing your peanut butter rice Krispie treats in the refrigerator, then I would allow them to come to room temperature before serving so that their texture is chewy and not hard.