If you’re looking for thick, chewy, Bakery Style Monster Cookies loaded with peanut butter, oats, chocolate chips, and colorful M&M’s, you’ve come to the right place! These oversized cookies have crisp edges, soft centers, and the perfect balance of sweetness and texture!

Thick Bakery Style Monster Cookies!

There is something special about a great Bakery Style Monster Cookie. They’re thick, soft in the center, packed with oats, peanut butter, chocolate chips, and colorful M&M’s, and somehow stay chewy for days. While many homemade Monster Cookies turn out flat or crumbly, this recipe is absolute perfection and will quickly be a bakery-worthy treat everyone loves.

This is my all-time very favorite cookie recipe and I am so excited to share it with you! I can’t take credit for it though, I found it at Blue Bowl Recipes !

Blue Bowl Recipes

Why this Recipe Works

Peanut Butter Equals Softness and Structure – It also binds the oats and mix-in’s together without making the cookie cakey, adding structure so the cookies don’t spread into thin discs.

Large Scoops Make Perfect Cookies – The outer edge sets first while the center remains soft. The contrast between slightly firm edges and a thick chewy center is one of the hallmarks of bakery cookies.

Extra M&M’s and Chocolate Chips Gives Bakery Appearance – When mix-in’s are visible on top the cookies look more loaded and appear more premium.

Ingredients You’ll Need

1 cup Butter (Softened) – Adds rich flavor and creates a soft, tender cookie texture.

1/2 cup Peanut Butter – Provides the classic Monster Cookie flavor and helps keep the cookies chewy.

3/4 cup Sugar – Sweetens the cookies and contributes to lightly crisp edges.

3/4 cup Brown Sugar – Adds moisture, a caramel like flavor, and a softer texture.

2 Eggs – Binds the ingredients together and helps the cookies rise and stay tender.

1 tsp Vanilla – Enhances the overall flavor with warm, sweet notes.

2 3/4 cups Flour – Forms the structure of the cookies and gives them their bakery style thickness.

1 tsp Baking Soda – Leavening agent that helps the cookies spread and rise properly.

1/4 tsp Salt – Balances the sweetness and enhances the flavors.

1 cup Old Fashioned Rolled Oats – Adds hearty texture and the classic Monster Cookie chew.

1 1/4 cups M&M’s – Provides colorful crunch and bursts of chocolate flavor throughout the cookies.

1 cup Chocolate Chips – Adds rich, melty chocolate in every bite.

How to Make Thick Bakery Style Monster Cookies

Preheat oven to 350 degrees. Line baking sheet with parchment paper.

In a large mixing bowl, cream together 1 cup softened butter and 1/2 cup peanut butter.

Mix in 3/4 cup sugar and 3/4 cup brown sugar until well creamed.

Add in 2 eggs and 1 tsp vanilla.

In a separate small bowl, whisk together 2 3/4 cups flour, 1 tsp baking soda, and 1/4 tsp salt.

Mix the dry mixture into the wet ingredients just until combined.

Then mix in 1 cup old fashioned rolled oats, 1 1/4 cups M&M’s, and 1 cup chocolate chips.

Place 4 tbsp size scoops of cookie dough on the prepared baking sheet, leaving room between each cookie to spread. (I recommend putting only 6 dough balls on the pan at a time.)

Bake for 10 minutes.

Reshape the Cookies – With the edge of a spatula right after removing from the oven while they are still soft.

Finishing Touch – Press in additional M&M’s and chocolate chips right after reshaping and removing from the oven.

Let the Dough Rest After Baking – Leave cookies on the baking sheet for 5-10 minutes before moving them. This helps the centers finish setting and the cookies stay thick and chewy.