Monster cookie bars couldn’t be easier to make. This sweet treat is a great way to use up leftover candy and bakes up in no time to make your littlest monsters happy!
We’re just over a month away from Halloween, but I feel like I’ve been seeing Halloween candy at the store for weeks now.
I’m not the only one, right?
With Halloween decorations appearing around the neighborhood and the new Hocus Pocus movie coming out, it’s time to start planning for that post-Halloween problem:
What do we do with all of this leftover Halloween candy?
These monster cookie bars are the perfect solution if you ask me. Whether you’ve got an excess of mini M&M’s or candy bars, you can toss just about anything in this recipe and count on it being delicious!
WHAT ARE MONSTER COOKIE BARS?
Monster cookie bars are an even easier bar version of those cookies!
They’re thick, chewy, just a little gooey, and definitely the perfect way to use up a little leftover Halloween candy. I can only imagine how good these monster cookie bars would be with chopped Snickers, Reese’s Cups or Twix.
HOW TO MAKE MONSTER COOKIE BARS
If you’ve made my sugar cookie bars, you already know that cookie bars are even easier to make than individual cookies. And the extra fun part of this recipe is that you can change up the add-ins to whatever you have in your pantry!
In addition to semisweet or milk chocolate chips, monster cookie bars have a heaping cup of mix-ins.
So what can you include?
Like I mentioned above, classic M&M’s are traditional, so those are always a great option.
But don’t feel like you have to stop there! Some other ideas include:
- Reese’s Pieces
- Mini Reese’s Cups
- Salted peanuts
- Mini pretzels
- Chopped mini candy bars
- Peanut M&M’s
- Caramel M&M’s
Get the idea? You can use a cup of one add-in or mix together a variety of your favorites.
This is such a great way to use up leftover Halloween candy. After all, we all know that after a week or so, you get tired of finding random mini candy bars around the house.
What kind of peanut butter and oats should you use?
You will want to use creamy peanut butter for these cookie bars. You can use regular peanut butter or the no-stir natural peanut butter, but I don’t recommend using the natural peanut butter that they grind right in the store.
It tends to be more grainy and isn’t great for baking. You want a super smooth peanut butter for this recipe.
Also, make sure you use old-fashioned oats in these bars. Quick-cooking oats will not work in this recipe.
Making this recipe
Start by lining a 13×9-inch pan with foil. Make sure to leave about 1 inch of foil hanging over the sides so you can easily pull the monster cookie bars out of the pan later.
Spray the foil lightly with nonstick spray and set the pan aside.
Use a mixer to cream the butter, peanut butter, and sugars together on medium speed until light and fluffy. This will take about 3 minutes.
Add the vanilla and eggs and mix to combine.
Whisk together the flour, baking soda, salt, and oats. Add the dry ingredients to the butter mixture, then stir in your chocolate chips and add-ins.
Spread the batter into the prepared pan. If you’d like, you can add extra goodies such as M&M’s, pretzels, etc, onto the top; just make sure to press them lightly into the batter.
Bake the bars for about 30-35 minutes. Like chocolate chip blondies, I prefer to slightly under-bake these cookie bars than over-bake them.
I also like to sprinkle the tops of my monster cookie bars with some flaky sea salt right after they come out of the oven, but that’s totally optional!
Let the bars cool completely before removing them from the pan and cutting into squares.
Store monster cookie bars in an airtight container at room temperature for up to 3 days.
If you’d like to store them for longer, keep them in the freezer.
Place them in an airtight container with layers of parchment paper or wax paper between the layers. Let them thaw at room temperature, or take them out 1 or 2 at a time and microwave them for about 30 seconds to thaw and warm them up!