Name: St. Patrick's Day Oreo Cookie Bars
Prep time: 10 min
Cook time: 40 min
Total time: 50 min
Yield: 15
Cuisine: American
Ingredients: 2 cups unsalted butter, melted; 2 1/2 cups sugar; 1 cup brown sugar, packed; 4 eggs; 2 egg yolk; 4 teaspoons vanilla extract; 5 cups all-purpose flour; 4 teaspoons cornstarch; 1 teaspoon baking powder; 2 teaspoons salt; 2 cups white chocolate chips; 2 cups green Mint M&M’s; 24 Mint Oreo cookies, chopped

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Festive St. Patrick’s Day cookie bars are an easy dessert chock full of chopped Oreos, chocolate chips, and M&Ms.

Celebrate with these St. Patrick’s Day Oreo cookie bars for an easy, colorful, delicious holiday treat.

a few St. Patrick's Day Oreo cookie bars served on a white plate, with shamrock confetti surrounding the plate.

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When various holidays roll around throughout the year, one of best ways to celebrate is with yummy food!

But who says holiday desserts have to take a lot of time and effort?

These St. Patrick’s Day Oreo cookie bars are proof that you can enjoy a festive and delicious dessert, without spending all day in the kitchen.

These cookie bars are chock full of tasty goodies, including chopped mint Oreo cookies and M&Ms.

The result is a sweet treat with just the right amount of green color to help them feel special–and plenty of flavor so they’re sure to disappear fast.

More St. Patrick’s Day Recipes You’ll Love:

a stack of mint Oreo cookie bars, dotted with green M&Ms, on a white plate for a St. Patrick's Day party.

St. Patrick’s Day Mint Oreo Dessert Bars

I love using Oreo cookies to make various holiday desserts.

It’s an easy way to add a lot of delicious flavor to the dessert, and you can take advantage of seasonal offerings to add a bit of color, too!

For example, I make Halloween Oreo cake bars every year, and these Valentine’s Day Oreo brownies are always a hit.

And of course, an Oreo pound cake can be enjoyed for any holiday, and you can swap out varieties of Oreos for some color.

So making St. Patrick’s Day cookie bars chock full or Oreos was only natural!

These bars are perfect for serving as an easy dessert at a St. Patrick’s Day party, or you can sell them at a bake sale, or bring them as a treat for your child’s class party at school.

a white plate with a few mint Oreo cookie bars on it, with more cookie bars in the background, along with miscellaneous St. Patrick's Day decorations.

How to Make St. Patrick’s Day Oreo Bars

It’s really easy to whip these up!

Ingredients You’ll Need:

Butter
Sugar
Brown Sugar
Eggs
Vanilla Extract
All-Purpose Flour
Cornstarch
Baking Powder
Salt
White Chocolate Chips
Mint M&Ms
Mint Oreo Cookies

How to Make It:

Combine wet ingredients. First, you’ll beat melted butter with sugar and brown sugar until combined.

Add the eggs, one at a time, followed by the vanilla extract.

Add mix-ins. Next, you’ll add in some of the white chocolate chips, M&M candies and Oreo cookie pieces, reserving some for topping later.

overhead view of a mixing bowl filled with cookie dough, green M&Ms, and mint Oreo cookie pieces.

Mix the batter until the additions are incorporated well.

overhead view of a mixing bowl with M&Ms and Oreo pieces mixed into cookie dough.

Bake. Last, you’ll spread the batter into a prepared pan. Top with the reserved white chocolate chips, M&Ms and Oreo pieces.

batter for mint Oreo cookie bars in a pan, ready to be baked.

Bake for about 40 minutes, or until the edges are beginning to turn golden brown.

Remove from oven and cool completely before slicing and serving.

close-up view of sliced Oreo cookie bars made for St. Patrick's Day.

Notes and Adaptations:

We like the color and flavor from Mint Oreos, but you can use regular Oreo cookies if preferred.
Leftovers can be stored at room temperature in an airtight container for up to 3-4 days.
If you can’t find mint M&Ms, you can use regular green M&Ms.

Recommended Equipment:

Yield: 15-18 Bars