When oatmeal and peanut butter cookies collide with M&M’s, chocolate chips, and walnuts, the result’s a batch of chewy, irresistible Basic Monster Cookies!
I’ve liked these Peanut Butter Oatmeal Cookies since my mother used to bake up an enormous batch again within the Seventies. She made a big model, about ¼ cup of dough per cookie; no surprise they had been known as monster cookies!

Why You Should Make
- If you happen to ever want an enormous batch of tasty cookies for an occasion, this recipe is the reply.
- There is no such thing as a flour in monster cookies, so it’s good for individuals who can’t have gluten.
- If you happen to love peanut butter desserts, these cookies might be successful.
- They’re loaded with all kinds of scrumptious elements together with M&Ms, chocolate chips, and peanut butter.
I’ve reminiscences of consuming these loaded peanut butter oatmeal cookies proper out of the freezer once I was a youngster. Apparently, I haven’t matured a lot since then! My mother’s traditional monster cookie recipe known as for 12 eggs, a pound of butter, and 18 cups of oatmeal. Cutting down her recipe is a should!
Ingredient Notes
- Kitchen Staples – Sugar, Brown Sugar, Baking Soda, Butter (salted)
- Eggs – Use giant eggs, have them at room temperature for simple incorporation
- Vanilla Extract – Be certain that the label reads actual vanilla extract. Don’t use imitation vanilla.
- Peanut Butter – Creamy peanut butter. I take advantage of Jif. Don’t use pure peanut butter because the consistency isn’t ultimate for this recipe.
- Fast Oats – Not old style oats. You’ll need the softer texture of fast oats.
- Chocolate Chips – Semisweet
- Walnuts – Elective. Chopped. If you happen to use them, you might need to toast them briefly in a skillet or the oven to convey out their important oils (which provides taste).
- Common M&Ms – 1 pound or 16 ounces. Reserve some if you wish to garnish after they’re baked. Simply press a number of onto the highest of the cookies shortly after they arrive out of the oven. Watch out because the pan might be sizzling!
Recipe Ideas
These yummy cookies are an ideal approach to get your peanut butter chocolate repair. They freeze nice, so don’t fear in regards to the giant quantity a batch makes. Plus you possibly can shake them up for the vacations by utilizing seasonal M&M’s as I did with these Patriotic Monster Cookies.
Listed below are a number of tips about methods to Make Monster Cookies:
- That is simply half of my mother’s recipe, that used 12 eggs and so forth. You’ll be able to simply double it in the event you’re feeding a big group, but it surely additionally cuts in half completely in the event you’d moderately make a fairly sized batch of three dozen cookies.
- Use fast oats as a substitute of old style oats. The thinner flakes work higher in these loaded cookies. Don’t use Prompt Oats as they’re too fragile.
- As talked about, you can also make these peanut butter oatmeal cookies with both 1 ½ tablespoons of cookie dough or a ¼ cup of cookie dough per cookie. Simply modify the baking time.
- Chilly dough will unfold lower than room-temperature cookie dough. If you’d like thicker cookies, simply chill the dough earlier than scooping.
- Don’t over-bake these cookies. I like them a wee bit underdone so that they’re nonetheless chewy.
- PRO-Tip: When measuring out sticky elements like peanut butter, honey, and corn syrup, spray your measuring cup with non-stick spray and they’re going to slide proper out! Sport changer!!
- I like utilizing a cookie scoop so that each one the cookies are the identical measurement. If the dough begins sticking within the scoop, simply clear it and proceed.
- PRO Tip: Typically, even when utilizing a cookie scoop, cookies won’t bake up into good rounds. If this bothers you, take your spatula and faucet them into form after they’re sizzling and contemporary out of the oven. Watch out for the reason that baking sheet might be sizzling. Use a sizzling pad.
- PRO Tip: One other trick to make these cookies bakery shop-worthy is to order a number of M&M’s and chocolate chips to press into the new cookies to garnish.
- To freeze, I like to position the cooled cookies in a gallon-sized Ziploc freezer bag, take away as a lot air as doable, after which place them within the freezer. They can be layered between sheets of parchment in a lined, hermetic container.
- Typically, cookies might be frozen for as much as three months, however I’m certain I’ve eaten cookies older than that from my freezer!

Steadily Requested Questions
These monster cookies had been new on the scene when my mother first baked up that humongous batch utilizing a dozen eggs approach again within the Seventies. Her recipe card known as for ¼ cup of dough per cookie. If these aren’t monster-sized cookies, I don’t know what are!
One other believable clarification is that they’re a mishmash of recipes identical to Frankenstein was a mashup of a monster! Or that the scale of the recipe is monstrous! I’m not sure there’s a definitive reply. I simply know that I liked these peanut butter oatmeal cookies from my first chew!
I discovered this data within the feedback of one other Monster Cookie Recipe:
“I’ve the unique monster cookie recipe. It was made within the Thirties by the CCC (Civilian Conservation Corps) within the Melancholy period. The monster title got here from the scale of the recipe, not the scale of the cookie. It has 12 eggs, 2 lbs brown sugar, 4 cups white sugar, 1 tbs vanilla, 1 tbs Karo, 8 tsp soda, 1 lb butter or margarine, and three lbs chunky peanut butter. Combine in a really giant bread bowl. Add 18 cups of rolled oatmeal. Add 1 lb M&M’s and 12 oz chocolate chips. There’s NO flour. I anticipate the sweet was a later embellishment. My 92-year-old husband’s aunts obtained the recipe when their husbands had been within the CCC.”
Retailer in an hermetic container at room temperature for 3-4 days.
Sure, they freeze fantastically. Put them in a freezer-quality gallon Ziploc bag and hold them within the freezer for 3-4 months. Defrost at room temperature earlier than serving, although I’m pleased to eat a frozen cookie!
Sure, the dough can even freeze nicely. Scoop out dough balls and place them on a rimmed baking sheet. Place them into the freezer, lined with plastic wrap, for a number of hours till they’re frozen strong. Then put the frozen dough balls right into a freezer-quality Ziploc bag to retailer within the freezer. These ought to hold nicely for 3-4 months. You’ll be able to bake the dough balls proper from the freezer, however you’ll want to increase the baking time. Or you possibly can defrost the dough balls within the fridge and bake.
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Elements
- ½ cup of salted butter, at room temperature
- 2 ¼ cups brown sugar
- 2 cups sugar
- 6 eggs
- 2 tablespoons vanilla
- 2 ⅔ cups peanut butter
- 4 teaspoons baking soda
- 9 cups fast oats
- 1+ cup chocolate chips
- 1 cup chopped walnuts
- ½ pound M&Ms, plus extra to garnish
Directions
- Preheat the oven to 350º. Line baking sheets with parchment paper and put aside.
- Mix butter and sugars. Combine in eggs, then add vanilla and peanut butter.
- Combine in soda, then oats, chocolate chips, walnuts, and M&Ms.
- Scoop out rounded tablespoons of dough and place them onto a parchment-lined cookie sheet.
- Bake for 10-12 minutes. See the word under if you wish to make bigger cookies.
- Cool on rack earlier than serving.
Notes
The unique recipe requires ¼ cup dough balls to be baked for 20 minutes in the event you really need MONSTER cookies.
I prefer to press a number of M&M’s into the tops of the cookies as quickly as they arrive out of the oven for a prettier presentation.
The recipe can simply be lower in half if you wish to make 3 dozen as a substitute of 6.
2 cookies = 1 serving in the event you’re checking the dietary data under.
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Diet Data:
Yield:
36
Serving Measurement:
2 cookies
Quantity Per Serving:
Energy: 374Whole Fats: 19gSaturated Fats: 6gTrans Fats: 0gUnsaturated Fats: 11gLdl cholesterol: 39mgSodium: 316mgCarbohydrates: 46gFiber: 3gSugar: 31gProtein: 8g
