M&M Chocolate Bars

Name: M&M Chocolate Bars
Prep time: 10 min
Cook time: 25 min
Total time: 35 min
Ingredients: 1½ cups all-purpose flour; 1½ cups quick-cooking rolled oats; 1 cup packed light brown sugar; 1 teaspoon salt; 1 cup plus 2 tablespoons unsalted butter (softened, divided); 1 (14-ounce) can sweetened condensed milk; 1 (11.5-ounce) bag milk chocolate chips; 1 cup plain M&M’s

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Our best-loved M&M chocolate bars have chewy layers of oats and chocolate studded with M&Ms – this top-requested dessert feeds a crowd!

Close up image of M&M chocolate bars stacked on top of each other.

Our go-to Dessert

We LOVE hosting and inviting friends and family over – and of course feeding them! Which is why we love bar desserts that feed a crowd, like our best-loved M&M chocolate bars!

This dessert is a go-to and requested ALL of the time! As mentioned before, they make several servings in one batch (15 in this one) and are easy to throw together (about 10 minutes prep).

And who doesn’t love M&Ms? You could even change it up and use your favorite flavor. We LOVE Baking with M&Ms – from M&M cookies to M&M cookie cake – they’re a delicious addition to so many desserts and the perfect addition to the chewy oats in this one.

Even our local firefighters love this treat and request it each year!

WHY WE LOVE IT:

So easy – so yummy! They are so simple and delicious. EVERYONE asks for the recipe. They’re also great with ice cream.
The perfect treat to change up. Use different M&Ms for different holidays (or birthdays!).
Plan ahead of time. This treat can easily be made in advance which is great for busy days.

Ingredients

PREP TIME: 10 minutes

COOK TIME: 25 minutes

1½ cups all-purpose flour – see How to Measure Flour
1½ cups quick-cooking rolled oats – also known as instant oats
1 cup packed light brown sugar – or dark brown sugar
1 teaspoon salt
1 cup plus 2 tablespoons unsalted butter softened, divided – see How to Soften Butter Quickly
1 (14-ounce) can sweetened condensed milk – NOT evaporated milk
1 (11.5-ounce) bag milk chocolate chips – or use semi-sweet or dark chocolate chips. Try peanut butter, white chocolate, or peanut butter chips.
1 cup plain M&M’s candy – or mini M&M’s, Reese’s pieces, holiday sprinkles, toffee bits

Oat mixture pressed into the bottom of a greased pan.

How to Make M&M Chocolate Bars

PREP. Preheat the oven to 350°F. Grease a 9-x-13-inch baking dish and set aside, or Line the Pan with Parchment Paper.
OAT BATTER. In a large bowl, mix 1½ cups flour, 1½ cups oats, 1 cup brown sugar, 1 teaspoon salt and 1 cup butter with a spoon. Remove 1 cup of the mixture and set aside.
- Press the remaining oat mixture into the bottom of the prepared baking dish.
CHOCOLATE LAYER. In a medium pot, combine 1 can of condensed milk, 1 bag of chocolate chips, and the remaining 2 tablespoons of butter over medium-low heat. Stir constantly until the chips are melted and everything is mixed well.
- Pour the melted chocolate mixture over the oat layer and spread evenly. Sprinkle the reserved 1 cup oat mixture over the chocolate.
BAKE. Top with 1 cup plain M&M’s and bake for 25–30 minutes. Let cool completely in the pan before cutting.

M&M chocolate bars stacked on top of each other on white plate.

More M&M Treats

M&M Brownies

35 mins

Peanut Butter M&M Cookies

17 mins

Chocolate Chip M&M Cookies

18 mins

M&M Cookie Cake

28 mins

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Summer Desserts

5 hrs 10 mins

5 from 76 votes

M&M Chocolate Bars

By: Lil’ Luna

Our best-loved M&M chocolate bars have chewy layers of oats and chocolate studded with M&Ms – this top-requested dessert feeds a crowd!

Servings: 15

Prep: 10

Cook: 25

Total: 35

Equipment

9×13 baking dish

Ingredients

▢ 1½ cups all-purpose flour
▢ 1½ cups quick-cooking rolled oats
▢ 1 cup packed light brown sugar
▢ 1 teaspoon salt
▢ 1 cup plus 2 tablespoons unsalted butter softened, divided
▢ 1 (14-ounce) can sweetened condensed milk
▢ 1 (11.5-ounce) bag milk chocolate chips
▢ 1 cup plain M&M’s

Instructions

Preheat the oven to 350°F. Grease a 9×13-inch baking dish and set aside.
In a large bowl, mix flour, oats, brown sugar, salt, and 1 cup butter with a spoon. Remove 1 cup of the mixture and set aside.
Press the remaining mixture into the bottom of the prepared baking dish.
In a medium pot, combine condensed milk, chocolate chips, and the remaining 2 tablespoons of butter over medium-low heat. Stir constantly until the chips are melted and everything is mixed well.
Pour the chocolate mixture over the oat layer and spread evenly. Sprinkle the reserved oat mixture over the chocolate.
Top with M&M’s and bake for 25–30 minutes. Let cool completely in the pan before cutting.

Video

Notes

Variations. Use different types of M&M’s, such as white chocolate, peanut butter, or holiday M&M’s. Change the chocolate chips and use peanut butter, butterscotch, or white chocolate chips.

Store. Whether you make these ahead of time or wish to store leftovers, store them covered, on the counter for 3 days. To freeze, wrap tightly with plastic and a freezer bag for 2-3 months.

Nutrition

Serving: 1bar, Calories: 310kcal, Carbohydrates: 39g, Protein: 3g, Fat: 16g, Saturated Fat: 10g, Polyunsaturated Fat: 1g, Monounsaturated Fat: 3g, Trans Fat: 1g, Cholesterol: 35mg, Sodium: 266mg, Potassium: 65mg, Fiber: 1g, Sugar: 23g, Vitamin A: 410IU, Vitamin C: 0.1mg, Calcium: 38mg, Iron: 1mg

Nutrition information is automatically calculated, so should only be used as an approximation.

Recipe FAQ

How to store M&M Chocolate Bars?

Whether you make these ahead of time or wish to store leftovers, store covered on the counter for 3 days. To freeze, wrap tightly with plastic and a freezer bag for 2-3 months.

M&M Chocolate Bars