6 Irresistible Monster Mash Cookie Sandwiches

Oh my gosh, you HAVE to try these monster mash cookie sandwiches! They’re the absolute most fun Halloween treat I’ve ever made – and trust me, I’ve baked my fair share of spooky sweets over the years. Picture this: soft, chewy chocolate chip cookies sandwiched with creamy frosting and turned into adorable little monsters with candy eyes peeking out everywhere. My kids go absolutely wild decorating these – last year my youngest made one with like twelve eyeballs because “real monsters have lots of eyes, Mom!”

The best part? Even if your decorating skills aren’t perfect (mine definitely aren’t), these cookies still turn out looking totally adorable and festive. The cookies bake up nice and thick so they hold their shape when you sandwich them, and the frosting acts like glue for all those silly candy decorations. I swear, every time I bring these to Halloween parties, both kids and adults go crazy for them. They’re like edible works of art that just happen to taste incredible too!

What started as a fun kitchen experiment with my little monsters has become our favorite Halloween tradition. The smell of warm cookies mixed with vanilla frosting instantly puts me in spooky season mode now. And the best part? They’re way easier to make than they look – just wait until you see how simple the decorating really is!

Why You’ll Love These Monster Mash Cookie Sandwiches

Let me tell you why these cookie monsters will become your new Halloween obsession:

• So easy even little hands can help – My kids practically take over the decorating every year (though we do have to monitor the candy eye distribution before someone uses the whole bag on one cookie!)
• Endless ways to customize – Use different frosting colors, sprinkle “fur,” or give your monsters crazy hairdos with piped icing
• Total crowd-pleasers – I’ve never brought leftovers home from a party (though my family tries to hide a few for themselves first)
• Perfect make-ahead treat – Bake the cookies one day, decorate the next (with a glass of wine after the kids are in bed, if we’re being honest)
• They taste as good as they look – That perfect combo of soft cookie, creamy frosting and melty chocolate chips gets me every time

Ingredients for Monster Mash Cookie Sandwiches

Here’s what you’ll need to make these adorable (and delicious) monster cookies – I’ve included all my little tweaks and substitution notes too:

• 2 1/4 cups all-purpose flour (or gluten-free 1:1 blend if needed – I’ve used Bob’s Red Mill with great results)
• 1 tsp baking soda – make sure yours is fresh! Nothing worse than flat cookies
• 1 tsp salt – I use kosher salt because I love how it balances the sweetness
• 1 cup unsalted butter, softened – this means you should be able to make an indent with your finger but it’s not melting (take it out about 30 minutes before baking)
• 3/4 cup granulated sugar
• 3/4 cup brown sugar, packed – dark brown gives more molasses flavor but light works too
• 2 large eggs – room temp blends better (just pop them in warm water for 5 minutes if you forgot to take them out)
• 1 tsp pure vanilla extract – the good stuff makes a difference here
• 1 cup chocolate chips – I use semi-sweet but my kids beg for mini M&Ms sometimes
• 1 cup frosting – any flavor you like! We switch between vanilla and cream cheese
• Food coloring (optional) – gel works best for vibrant monster colors
• Candy eyes – the more the merrier, in my opinion!

How to Make Monster Mash Cookie Sandwiches

Okay, let’s get to the fun part! Making these monster cookies is easier than you think – I’ll walk you through each step with all my little tricks:

1. Preheat your oven to 375°F (190°C) and line your baking sheets with parchment paper. Trust me, this saves so much cleanup time later!
2. Whisk together flour, baking soda and salt in a bowl. I like to do this first so it’s ready when I need it. No need to sift unless your flour is super lumpy.
3. Cream the butter and both sugars together for about 2 minutes until light and fluffy. This is where the magic starts – you want it looking almost like frosting. Scrape down the bowl halfway through to make sure everything gets mixed evenly.
4. Beat in eggs one at a time, then add the vanilla. Let each egg fully incorporate before adding the next – this helps prevent that weird eggy separation.
5. Gradually add the dry ingredients on low speed until just combined. Don’t overmix here or your cookies might get tough! A few flour streaks are fine – they’ll disappear when you add the chocolate chips.
6. Fold in the chocolate chips by hand. I’ve learned the hard way that using the mixer can break them into tiny pieces – not what we want!
7. Drop tablespoon-sized dough balls onto your prepared sheets, spacing them about 2 inches apart. I use a cookie scoop for uniform size (and less mess). The dough might seem sticky – that’s normal!
8. Bake for 9-11 minutes until the edges are just golden but centers still look slightly underdone. They’ll keep cooking on the pan – this gives you that perfect soft texture.
9. Cool completely on a wire rack before decorating. I know it’s tempting, but warm cookies will make your frosting melt right off! I usually bake in batches so the first ones are cool by the time the last batch comes out.

Decorating Your Monster Mash Cookies

Now for the best part – turning these into silly monsters! Spread about a tablespoon of frosting on the flat side of one cookie, then sandwich with another. Get creative with food coloring – we love making purple, green and blue monsters. Use a butter knife or piping bag to add crazy “hair,” then stick on candy eyes (as many as you want – no judgment here!). Last year my son made a cyclops while my daughter went for a spider-monster with piped legs. Let them sit for about 30 minutes so the frosting sets before serving…if you can wait that long!

Tips for Perfect Monster Mash Cookie Sandwiches

After making dozens (okay, hundreds) of these monster cookies, I’ve picked up some foolproof tricks:

• Don’t overmix the dough – Seriously, stop as soon as the flour disappears. Overworked dough makes tough cookies, and we want these babies soft!
• Chill sticky dough for 15 minutes – If your dough feels too wet to handle (hello, humid summer days!), a quick chill fixes everything. Just don’t forget about it like I did once – rock-hard dough is no fun.
• Gel food coloring is your friend – The liquid stuff makes frosting runny, but gels give you those crazy vibrant monster colors without changing consistency.
• Rotate pans halfway through baking – Ovens have hot spots, and we want all our monsters evenly golden.
• Let cookies cool completely – I know it’s hard to wait, but warm cookies will turn your frosting into a melty mess.

My biggest tip? Have fun with it! Crooked eyes and lopsided smiles just give your monsters more personality.

Storing and Serving Monster Mash Cookie Sandwiches

These monster cookies keep surprisingly well – if they last that long! Store them in an airtight container at room temperature for up to 3 days (layer them between parchment paper so the decorations don’t stick together). Want to prep ahead? Freeze unfrosted cookies for up to 2 months, then thaw and decorate when you’re ready. I love bringing these to Halloween parties arranged on a spooky platter – they always disappear first! For school events, I pack them in cupcake liners so little hands can grab them easily without smashing the decorations.

Monster Mash Cookie Sandwiches FAQs

I get asked these questions ALL the time when I bring these monster cookies to parties – here’s everything you need to know:

Can I use store-bought frosting?
Yes! But homemade is creamier and tastes better in my opinion. If you’re short on time, jazz up canned frosting by whipping in a little extra powdered sugar and vanilla.

How do I prevent my cookies from spreading too much?
Chill the dough for 15-30 minutes before baking – this is my secret weapon! Also make sure your baking soda is fresh and your oven is fully preheated.

Can I make these ahead of time?
Absolutely! Bake the cookies up to 3 days in advance (store in an airtight container) or freeze unfrosted for 2 months. Just decorate the day you’re serving so the eyes stay put.

What if I don’t have candy eyes?
Get creative! Use mini chocolate chips upside down, pipe white frosting dots with black gel, or even use small round sprinkles. Imperfect monsters have more character anyway!

Can I make these gluten-free?
Yes! I’ve had great results with 1:1 gluten-free flour blends. The texture is nearly identical – just don’t overmix the dough.

Nutritional Information

Just between us, I don’t count calories when it comes to my monster mash cookies – they’re a once-a-year treat! But for those who are curious, here’s the scoop (based on 1 sandwich cookie): 280 calories, 12g fat, 38g carbs, and 20g sugar. Remember, these are just estimates – your exact numbers will depend on how generous you are with the frosting and candy eyes! I always say one look at those adorable monster faces makes any nutrition info totally worth it.

Share Your Monster Mash Creations!

I’d absolutely LOVE to see your monster cookie masterpieces! Tag me on Instagram @MonsterCookieQueen or use #MonsterMashCookies so I can cheer on your creations. Some of my favorite reader submissions get featured in my monthly newsletter – last year we had a zombie cookie that still gives me happy nightmares! Don’t be shy – imperfect monsters are the most fun anyway. Now go make some cookie magic!

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