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World's Easiest Peanut Butter Cookies: Only 3 Ingredients!

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Not a particularly skilled baker, Mary loves making cookies and has increased her gluten-free cookie repertoire to treat a GF friend.

These GF cookies contain only three ingredients!

These GF cookies contain only three ingredients!

My Grandmother's Recipe

Here it is: My contender for the world's easiest cookie recipe.

It's fun to make these on June 12, National Peanut Butter Cookie Day. But really, I'll take any excuse to make—and share—this terrific recipe from my grandmother, who passed away just shy of her 96th birthday.

As a child I watched her make many amazing desserts, mostly nut-filled Eastern European specialties like roszke (crescent-shaped cookies) and potica (sweet, yeasted bread with layers of chopped-walnut paste), along with main dishes like halupki (stuffed cabbage).

My dad and brother carry on those labor-intensive, time-consuming traditions today. But for me, the one recipe that's always stuck—mainly because it's so simple that it's nearly impossible to forget—is for these classic all-American treats.

There wasn't much awareness, when I was a kid, of gluten sensitivity. So my grandmother didn't have that particular reason for making her peanut butter cookies flourless. I think she just wanted something richly delicious and lightning fast!

See if these aren't the best (and easiest!) peanut butter cookies you've ever made.

Three Ingredients

  • 1 cup creamy or chunky peanut butter
  • 1 cup sugar
  • 1 egg

Four Instructions

  1. Preheat oven to 350°F.
  2. In a bowl, combine all ingredients well. Chill in the fridge for 10 minutes or so.
  3. Drop by rounded tablespoons onto a greased or nonstick cookie sheet. Press down each little ball of dough with a fork, then press again to make a criss-cross pattern.
  4. Bake 8 to 12 minutes, depending on whether you like softer or crispier cookies. (Peak underneath with a spatula to make sure the bottoms aren't over-browning.)

Tips and Variations

  • How to avoid crumbling: Let the cookies cool completely before you transfer these off the cookie sheet. The same thing that makes these peanut butter cookies simple -- the lack of flour and other ingredients beyond the "key three" -- is, admittedly, a slight drawback in the cooling phase, as more time is needed than with a recipe that isn't flourless.
  • For extra decadence: add chocolate chips or chunks. Or press a Hershey's kiss into each ball of dough and skip the fork-pressing.
  • Type of peanut butter: You don't want to get too fancy with these. If your heart is set on natural peanut butter, be sure to use a no-stir kind. The type that separates is too liquidy for this recipe.
  • Type of sugar: Go for regular granulated sugar. I tried it once with organic sugar, and for some reason, the recipe didn't work. With plain old sugar and PB, you're golden!

Health Benefits

Yes, my best peanut butter cookies are full of sugar and fat. But they're also packed with protein, which gives them a distinct advantage over other cookies I make or buy. Not only are my kids rather meat-averse, but two of the three have attentional issues, so I'll grab any chance to sneak protein into them—especially at snacktime, which is right before they do homework, when I'm looking for something a bit filling that will help them focus and sustain their energy.

In fact, two of the five foods chosen by Cooking Light magazine in its "5 Foods That Should Have a Place in your Diet" piece are featured in this recipe: peanut butter and eggs. Yea!

Peanut Butter

What makes peanut butter so healthy? It's a good source of vitamin E, niacin, manganese, vitamin B6 and magnesium. it also provides copper, which helps us maintain our blood vessels, bones and immune system and might even reduce the risk of osteoporosis and heart disease. It contains oleic acid: a healthier kind of fat that, when it replaces less ideal fats, can help us maintain good cholesterol. Oleic acid is even believed to reduce insulin resistance, a phenomenon that raises blood pressure and can lead to diabetes. Among the numerous antioxidants in peanut butter, one called resveratrol has been shown to have anti-cancer effects and may decrease the risk of heart ailments, obesity and cognitive decline. In a nutshell (pun intended!), PB is caloric enough to make portion control important, but in moderation and as part of a healthy, balanced diet, it can assist in many key aspects of our well-being.

Add Seeds for More Nutrition

For even more of a nutrition boost, try mixing a modest amount of your favorite seeds (pepitas, hulled and roasted sunflower seeds, etc.) into the cookie dough. For finicky young eaters, I would suggest doing this gradually, starting with a ridiculously small amount of seeds, like a tablespoon for the whole batch of dough, adding more over time, as tolerated.

How to Make These Peanut Butter Cookies Vegan

To convert these to vegan peanut butter cookies, you'll need to substitute something for the egg, as a binder. I looked into various alternatives commonly used as egg substitutes for cookies, and most of them seem a bit unappetizing. (Mixing water and oil, for instance, is a popular solution, but peanut butter cookies are already full of healthy fat, so adding more seems dubious.)

I haven't yet tried this, but banana could be a flavor-friendly way of making my peanut butter cookies vegan. Simply substitute one-half of a mashed banana for the one egg. Of course, the banana will add some fruity flavor, but that should be pleasantly overpowered by the peanut flavor. Even if not, peanut butter and banana is a tasty combination! Because it makes cookies softer, banana can be a poor match for chewy cookie recipes—but mine is a crunchy-style cookie, so theoretically it could handle a bit of softening. If the resulting treats are too soft, keeping them in the fridge should help.

Allergy Alert

Obviously there's one group for whom these cookies are neither healthy nor safe: kids and adults with peanut allergies. This allergy can be very dangerous, even life-threatening. The fact that child peanut allergies in the U.S. doubled between 1997 and 2008 shows the danger of accidentally inflicting harm is no longer remote.

Check with your child's teacher before sending these cookies (or any treats, really) into the classroom or lunchroom.

Read More From Delishably

On the other hand, this recipe is fantastic for kids with wheat allergies, celiac disease, or some other need for a gluten-free diet! The first time I used it for a friend who follows a GF diet, it was so nice to be able to answer affirmatively when she queried, before tasting, "Are these peanut butter cookies flourless?" I've got just a few sweets recipes that are reliably tasty and meet her dietary needs, and this is certainly one of them.

For something close to the original recipe in taste and texture, you can substitute almond butter for the peanut butter (providing you won't be serving the cookies to tree-nut-allergic folks). Sunbutter (sunflower seed butter) also works, and because there's no leavening agent in this recipe to react with the chlorogenic acid naturally occurring in sunflower seeds, your sunbutter cookies won't turn an unappetizing shade of green when you use this recipe.

Packing PB?

Out of concern over peanut allergy, some schools have outlawed peanut products in sack lunches. (The practice is controversial in some areas and, of course, but is absolutely defensible, especially in the early grades.)

At others, like ours, lunches can contain peanut products, but families are asked to label them clearly as such. We use a Contains Peanut label from Zazzle as a warning when we pack PB&J sandwiches, peanut butter cookies, granola bars containing peanut, or any other food that contains this dangerous allergen.

The Nordic Ware Commercial Baker's Half Sheet isn't just for commercial bakers! Especially when used with parchment paper sheets, as is my home-baking habit, it cleans up in a flash and can be used for way more than cookies.

The Nordic Ware Commercial Baker's Half Sheet isn't just for commercial bakers! Especially when used with parchment paper sheets, as is my home-baking habit, it cleans up in a flash and can be used for way more than cookies.

My cookies have improved a lot of the past 16 months, and there's just one reason for that: these Nordic Ware sheet pans. (For home cooks, the "Commercial Baker's Half Sheet" is the size to get, easily fitting a dozen or more cookies, depending on how big you like to make them.)

They heat up in a beautifully uniform manner, so I don't end up with near-burnt cookie bottoms and semi-raw tops, as sometimes happened in the bad old days.

I chose these pans back in June 2020 to make easy sheet pan dinners (tip: if you open up a vacuum-sealed pack of supermarket gnocchi onto this pan, toss in olive oil, and roast, you will never, ever go back to the boiling method) and quickly began reaching for them when cookie baking as well. You'll see from my photo above that the sheets are no longer blemish free, but they still perform so wonderfully that I really don't care.

Value was my primary consideration, but it turns out The New York Times, Forbes, Food & Wine and Southern Living—all of which presumably have a much bigger testing budget than mineagree that these Nordic Ware cookie sheets are among the highest-quality on the market. Importantly, for sheet pan dinners, these pans can handle up to 450-degree heat without warping. For recipes (like cookies) requiring lower heat, I tend to use parchment sheets (generally safe up to 425 degrees, but check the instructions on your pack of parchment, just to be sure) for the easiest possible cleanup.

Magazine test-kitchen staff concur with my positive experience:

"In batch after batch of cookies, [the Nordic Ware half sheet] yielded bottoms that were evenly browned and insides that were well-baked without requiring excessive tweaking with recipe times," said Food & Wine.

The New York Times raves about its consistency, durability and affordability: "After years of heavy use at home and in our test kitchen, we’ve found it still lies flat and bakes cookies to an even golden brown. Some aluminum sheet pans may perform on a par with it, but the Nordic Ware consistently costs the least for a pan of its quality. It’s a durable workhorse of a pan that can handle a wide variety of tasks."

And I, average home cook and baker, say "Besides my beaten-up Le Creuset dutch oven, this sheet pan is my kitchen MVP! I use it every week for cookies, sheet pan dinners, and --don't tell anyone -- evenly heating up the occasional frozen junk food like fries or onion rings. It never fails."

Celebrate Silly Food Holidays!

We've talked about physical health; now how about mental health benefits? The year is full of semi-official excuses to try my peanut butter cookie recipe, given the number of relevant goofy (but fun) food holidays:

January 24 is National Peanut Butter Day.

Depending on your beverage of choice for cookie pairing, enjoy these cookies on National Milk Day (January 11), National Hot Chocolate Day (January 31), or if you're feeling decadent and there's no need to drive anywhere, National Irish Coffee Day (January 25).

The whole month of March has been decreed (by somebody!) National Peanut Month, with March 1 designated National Peanut Butter Lover's Day.

I'm not sure what the difference is between National Pack Your Lunch Day (March 1) and National Brown Bag It Day (May 25), but these cookies are great for both.

Because my recipe isn't low-cal, it's a nice pick for one of the best food holidays: International No Diet Day, which apparently is celebrated on May 6.

This recipe is so easy, it's a perfect choice for June 13, "Kitchen Klutzes of America Day" (count me in!). The skill level required is perfect for children, so give it a spin in February: National Bake for Family Fun Month.

Add some chocolate (mmmm) to this recipe and celebrate National Chocolate Chip Day (May 15) or National Chocolate Chip Cookie Day (August 4).

Put a small scoop of ice cream between two peanut butter cookies for a homemade ice cream sandwich, to celebrate the nation's ice cream day (June 27) or month (July).

October is National Cookie Month—enough said.

In November the "Peanut Butter Lovers" graduate to a whole month, not just a day.

And December 4 is National Cookie Day. Knock yourself out!

© 2009 Mary

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