Grandma’s Oatmeal Monster Cookies

The smell of cookies fresh from the oven, the warm kitchen, and the memories the dough bring back all the best moments. This Peanut Butter Oatmeal M&M Cookie recipe is one of those timeless treats—chewy, sweet, and packed with love. Grandma always believed that the best cookies weren’t just about the ingredients but the memories made while baking them. Now, I’m excited to share this family favorite with you!

Why You’ll Love These Cookies

• Soft & Chewy – The perfect mix of peanut butter, oatmeal, oats, coconut and brown sugar makes these cookies melt in your mouth.
• Full of Fun & Flavor – Mini M&Ms add a colorful, chocolatey crunch, while coconut gives a unique, cozy taste.
• Perfect for Sharing – Bake a batch and bring a little piece of Grandma’s kitchen to yours!

Ingredients

• 3 Eggs
• 1 cup White Sugar
• 1 cup Brown Sugar
• 1 cup Butter, softened
• 1 ½ cups Peanut Butter
• 1 tsp Vanilla Extract
• 2 tsp Baking Soda
• 2 cups Flour
• 5 cups Oatmeal
• 1 cup Mini M&Ms
• 1 cup Coconut

Grandma’s Baking Tips

• Always use real butter
• No mixer? No problem! – Stirring by hand adds a little extra love.
• Want a crispier cookie? – Bake for an extra 2 minutes for more crunch.
• Customize it! – Swap coconut for chopped nuts or extra M&Ms.

Oatmeal Monster Cookie

Recipe by zoeybohnenstinglDifficulty: Easy

Servings

48

cookies

Prep time

15

minutes

Cooking time per Batch

10

minutes

Calories

200

kcal

Ingredients

• 3 Eggs

• 1 C. White Sugar

• 1 C. Brown Sugar

• 1 C. Butter

• 1 1/2 C. Peanut Butter

• 1 tsp. Vanilla

• 2 tsp. Baking Soda

• 5 C. Oatmeal

• 1 C. Mini M&Ms

• 1 C. Coconut

Directions

• Preheat the oven to 350°F
• Mix the wet ingredients, in a large bowl mix, eggs, sugars, butter, peanut butter, and vanilla until smooth and creamy.
• Add in dry ingredients. Stir in baking soda, flour, and oatmeal until well combined
• Fold in the mix ins. Gently mix in the mini M&Ms and coconut until evenly distributed.
• Shape the cookies-scoop

Storing & Freezing

🍪 Store: Keep cookies in an airtight container for up to a week.
❄️ Freeze: Roll dough into balls and freeze for up to 3 months—just bake straight from the freezer!