These extra soft and chewy M&M cookie bars are so easy to make—no mixer, no dough chilling, no individual dough rolling required! You can use a mix of regular and mini M&Ms and chocolate chips for texture variety, and change out the colors to make them festive for a holiday.

Finally a cookie recipe without chilling!

Let’s call these no-chill, no-roll M&M cookies! When you need a big batch of cookies but are pressed for time (or mental energy, LOL), cookie bars are the solution. This recipe makes a generously sized 9×13-inch pan of M&M cookie bars, perfect for sharing, especially at the holidays. Kids love these, but so do adults. Seriously, aside from special diets, have you ever met anyone who would turn down a chewy chocolate chip M&M cookie bar? I’m pretty sure I haven’t!

Here’s Why You’ll Love These M&M Cookie Bars

  • Like a bigger batch of soft chocolate chip cookie bars—with colorful M&M candies!
  • Makes a large pan to serve a crowd.
  • A great recipe for young bakers to help with.
  • No mixer, no dough chilling, no dough ball rolling—no fuss!
  • Soft in the center, crisp around the edges.
  • As easy as a box mix, but way more delicious.
  • Add chocolate chips or white chocolate chips for texture variety.
  • Choose your color M&Ms to match a holiday or theme.

Unlike these soft-baked M&M cookies, there’s no dough chilling or rolling dough into individual balls and baking in batches. The only waiting you’ll have to suffer through is for the pan to cool for 1 hour before you cut them into bars. (I know, I’m sorry.)

Unlike these soft-baked M&M cookies, there’s no dough chilling or rolling dough into individual balls and baking in batches. The only waiting you’ll have to suffer through is for the pan to cool for 1 hour before you cut them into bars. (I know, I’m sorry.)

Easy Ingredients, No Mixer

Like with these favorite chewy chocolate chip cookies, using melted butter makes for the softest, chewiest bar cookies. I usually like to use melted butter in bar recipes like brownies and blondies because the bars taste chewy, not cakey. I tested this recipe with creamed softened butter, and the baked result ended up looking more like a puffy sheet cake.

Using melted butter also means you don’t need an electric mixer to make these bar cookies, AND you get that shiny, crackled look on top similar to brownies.

This recipe is similar to the Super Chewy Chocolate Chip Cookie Bars on page 28 of Sally’s Cookie Addiction, but I reduced the sugar a bit, since M&Ms are so sweet. We’re doing away with the extra egg yolk, and instead ensuring softness with an extra 1/2 teaspoon of cornstarch.

It’s also similar to my smaller recipe for chocolate chip cookie bars, but scaled up to make a full 9×13 pan. Here’s everything you need:

ingredients on marble counter including flour, eggs, brown and white sugars, butter, and more.

Have I Mentioned No Dough Chilling?

Just melt, mix, press, and bake! Chant it in your head while you get out the ingredients. Melt, mix, press, bake! Melt, mix, press, bake! No dough chill! No dough chill!

The dough will be slick from the melted butter, but should be easy enough to spread/press into the pan. In fact, it doesn’t even look like regular cookie dough and you might remember that from a batch of these chewy chocolate chip cookies. Before & after adding your add-ins:

I strongly recommend lining the baking pan with parchment paper (with overhang on the sides) to make cutting into bars easier. Spread the dough into the pan:

It’s almost gooey-like, so it’s easier to spread than regular, creamy-thick cookie dough. Bake for just 26–30 minutes and avoid over-baking:

I press a few more M&Ms and chocolate chips into the tops of the warm cookie bars, for looks. This is optional. Cool the bars for 1 hour inside the pan, then simply lift the whole thing out using the parchment paper lining. Set it onto a cutting board and slice. They’ll still be a bit warm and that’s fine!

Success Tips for M&M Cookie Bars

Feel Free to Pipe Some Buttercream Decor

These M&M cookie bars are fabulous on their own, but then again, a little frosting is always a good idea. My favorite chocolate buttercream is far from basic; it’s incredibly creamy, silky, smooth, and rich. Even though it’s wonderfully creamy, it holds its shape well, and is perfect for piping. It makes a delicious and beautiful finishing touch on this chocolate chip cookie cake, and would have the same effect on these cookie bars if you want to add some flair!

Sally’s Cookie Palooza

This recipe is part of my annual cookie countdown called Sally’s Cookie Palooza. It’s the biggest, most delicious event of the year! Browse dozens of cookie recipes over on the Sally’s Cookie Palooza page including:

  1. Make Ahead & Freezing Instructions: You can make the cookie dough and chill it in the refrigerator for up to 3 days or freeze for up to 3 months. Allow to come to room temperature and continue with step 4. Baked cookie bars freeze well for up to 3 months. Thaw bars overnight in the refrigerator and bring to room temperature before serving.
  2. Special Tools (affiliate links): 9×13-inch Baking Pan or this one | Heavy-Duty Whisk 
  3. Cornstarch: If you don’t have cornstarch, you can leave it out. The cookie bars will still be soft.
  4. Butter: Avoid letting the melted butter cool for too long, otherwise your dough will be crumbly instead of soft (and your cookie bars can end up cakey). You want it still warm, but not hot enough to begin cooking the eggs.
  5. M&Ms: You can use regular-size, mini, or a mix of both. I like to crush some of them, too, to sprinkle on the top before baking. Totally optional!
  6. Do I have to add chocolate chips? You can skip the chocolate chips. If you skip them, increase M&Ms to 1 and 1/2 cups (about 300g). You could also replace the chocolate chips with white chocolate chips, butterscotch chips, or peanut butter chips.
  7. 9-Inch Square Pan: To make a smaller 9-inch pan of cookie bars, use this similar scaled down recipe. For the add-ins, use 1 cup (200g) of M&Ms and 1/2 cup (90g) chocolate chips.

Keywords: M&M cookie bars

Reader Questions and Reviews

Julie T. says:

have made your oatmeal chocolate chip, your lemon ginger (surprise favorite from last year) raspberry almond cream cheese cookies (apricot cream cheese, but subbed in raspberry and sliced almonds. and i will definitely make these too ! Thank you for the ease of this one !! I only trust YOUR recipes for cookies !!! Thank you for all your hard work and happy holidays to you and your family !

These look great and easy! I don’t have m&ms at home. Can I use all chocolate chips?

In general, can M&ms and chocolate chips be used interchangeably? Thanks! ?

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