3-Ingredient Oatmeal Cookies

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It was a busy weekday evening, and the kids were clamoring for a sweet treat after dinner. Pantry almost bare, and time fleeting, I stumbled upon a recipe that seemed almost too good to be true: 3-Ingredient Oatmeal Cookies. Skeptical yet intrigued, I decided to give it a whirl. To my utter surprise (and delight!), these weren’t just edible – they were absolutely delicious! The warm, comforting aroma of baking oats filled the kitchen, and in less than 30 minutes, we had a batch of chewy, subtly sweet cookies that vanished in minutes. Even my pickiest eater couldn’t get enough! Since that first impromptu bake, these 3-Ingredient Oatmeal Cookies have become a staple in our home. They’re the perfect quick dessert, a wholesome snack, and a fantastic way to satisfy sweet cravings without any guilt. Seriously, if you’re looking for an incredibly easy, healthy-ish, and utterly satisfying cookie recipe, look no further. This is it.

Ingredients

  • 2 Ripe Bananas: The riper the bananas, the sweeter and more flavorful your cookies will be. Look for bananas with brown spots – these are perfect for baking as they are naturally sweeter and mash easily. They provide moisture and natural sweetness, acting as a binder in place of eggs and butter.
  • 1 Cup Rolled Oats (Old-Fashioned Oats): Use rolled oats, also known as old-fashioned oats. These provide the cookie’s structure, chewiness, and that classic oatmeal flavor. Quick oats can also be used in a pinch, but they might result in a slightly drier cookie. Avoid steel-cut oats, as they won’t cook properly in this recipe.
  • Optional Add-ins (To Taste): This is where you can get creative! While the cookies are delicious with just three ingredients, adding a few extras can elevate them to another level. Consider ingredients like chocolate chips, nuts, seeds, dried fruit, or spices. These additions allow you to customize the cookies to your taste and dietary preferences.

Instructions

  1. Preheat Your Oven and Prepare Baking Sheet: Preheat your oven to 350°F (175°C). Line a baking sheet with parchment paper or a silicone baking mat. This will prevent the cookies from sticking and make cleanup a breeze. Parchment paper is especially helpful for these cookies as they can be a little delicate.
  2. Mash the Bananas: In a medium-sized bowl, thoroughly mash the ripe bananas using a fork. You want to achieve a smooth, almost puree-like consistency, with only a few small lumps remaining. The mashed bananas will be the base of your cookie dough, providing moisture and sweetness.
  3. Combine Bananas and Oats: Add the rolled oats to the bowl of mashed bananas. Mix well with a spoon or spatula until the oats are evenly distributed and fully incorporated into the banana mixture. Ensure there are no dry pockets of oats remaining. The mixture should be thick and slightly sticky.
  4. Add Optional Ingredients (If Using): If you’re using any optional add-ins like chocolate chips, nuts, seeds, dried fruit, or spices, now is the time to gently fold them into the banana-oat mixture. Distribute them evenly throughout the dough. Don’t overmix at this stage.
  5. Scoop and Shape the Cookies: Using a spoon or a small cookie scoop, drop rounded tablespoons of the cookie dough onto the prepared baking sheet. Leave some space between each cookie, as they will spread slightly during baking. If you prefer flatter cookies, you can gently flatten them slightly with the back of a spoon. For thicker, chewier cookies, leave them in rounded mounds.
  6. Bake the Cookies: Place the baking sheet in the preheated oven and bake for 12-15 minutes, or until the edges of the cookies are lightly golden brown and the centers are set. Baking time can vary slightly depending on your oven and the thickness of your cookies. Keep an eye on them to prevent burning.
  7. Cool and Enjoy: Once baked, remove the baking sheet from the oven and let the cookies cool on the baking sheet for a few minutes before transferring them to a wire rack to cool completely. Cooling on the baking sheet helps them firm up a bit. These cookies are best enjoyed slightly warm or at room temperature. Store any leftovers in an airtight container at room temperature for up to 3 days or in the refrigerator for up to a week.

Nutrition Facts

(Per Serving – approximately 2 cookies, based on recipe using 2 medium bananas and 1 cup rolled oats, without optional add-ins. Nutritional values are estimates and can vary based on ingredient size and specific brands.)

  • Servings Per Recipe: Approximately 12 cookies (6 servings)
  • Calories Per Serving (2 cookies): Approximately 150-180 kcal
  • Fat: 2-3g

Note: Adding optional ingredients like chocolate chips or nuts will significantly increase the calorie, fat, and sugar content. These cookies are naturally gluten-free if you use certified gluten-free oats.

Preparation Time

  • Prep Time: 5-10 minutes (Mashing bananas, mixing ingredients, scooping cookies)
  • Cook Time: 12-15 minutes (Baking in the oven)
  • Total Time: 17-25 minutes (From start to finish, ready to enjoy!)

This recipe is incredibly quick and efficient, making it perfect for those times when you need a fast and easy treat. The minimal prep and short baking time mean you can have warm, freshly baked cookies in under half an hour, ideal for satisfying sudden sweet cravings or whipping up a last-minute dessert.

How to Serve

These 3-Ingredient Oatmeal Cookies are incredibly versatile and can be enjoyed in numerous ways:

  • Warm and Fresh: Enjoy them straight from the oven while they are still slightly warm and soft. This is when they are at their most comforting and delicious. The warmth enhances the natural sweetness and chewy texture.
  • With a Glass of Milk (or Plant-Based Milk): A classic pairing! The cookies are perfect for dunking in a cold glass of milk, whether it’s dairy milk, almond milk, oat milk, or soy milk.
  • Alongside Coffee or Tea: These cookies make a wonderful accompaniment to your morning coffee or afternoon tea. Their mild sweetness and comforting flavor complement hot beverages beautifully.
  • As a Healthy Snack: Thanks to the oats and bananas, these cookies are a more wholesome snack option compared to traditional cookies loaded with refined sugar and butter. They provide fiber and some nutrients, making them a decent choice for a mid-day or after-school snack.
  • Topped with Nut Butter: Spread a thin layer of peanut butter, almond butter, or cashew butter on top of a cooled cookie for added protein and healthy fats. This also enhances the flavor and adds a creamy texture.
  • Crumbled over Yogurt or Oatmeal: Break up a cookie or two and sprinkle them over your morning yogurt or oatmeal for added flavor and texture. They add a touch of sweetness and chewiness to breakfast.
  • In Lunchboxes: These cookies are a great addition to lunchboxes for both kids and adults. They are portable, relatively mess-free, and offer a healthier sweet treat option.
  • As a Base for Mini Desserts: Get creative! Use these cookies as a base for mini desserts. Top them with a dollop of whipped cream and fresh fruit for a simple yet elegant treat.
  • With Ice Cream: For a more indulgent dessert, serve a warm cookie alongside a scoop of vanilla or banana ice cream. The contrast of warm cookie and cold ice cream is delightful.

Additional Tips for Perfect 3-Ingredient Oatmeal Cookies

  1. Use Very Ripe Bananas: The key to the best flavor and sweetness in these cookies is using truly ripe bananas. Look for bananas with plenty of brown spots on the peel. These bananas are naturally sweeter and easier to mash, resulting in a better cookie texture and taste.
  2. Don’t Overmix the Dough: Once you’ve added the oats to the mashed bananas, mix just until combined. Overmixing can develop the gluten in the oats (even though they are gluten-free), potentially leading to tougher cookies. Gentle mixing is key for a tender result.
  3. Adjust Oat Quantity for Desired Texture: If you prefer chewier cookies, use slightly more oats (up to 1 ¼ cups). For softer, more delicate cookies, stick to 1 cup of oats. Experiment to find your perfect oat-to-banana ratio.
  4. Customize with Spices: Enhance the flavor profile by adding a pinch of spices. Cinnamon, nutmeg, and a touch of ginger are all wonderful additions that complement the banana and oat flavors. Start with ¼ teaspoon of each and adjust to your preference.
  5. Add a Touch of Vanilla Extract (Optional): While not strictly a 3-ingredient recipe with vanilla, a ½ teaspoon of vanilla extract can elevate the flavor subtly and add a touch of warmth. It’s a worthwhile addition if you have it on hand.
  6. Control Sweetness with Add-ins: If you are adding naturally sweet ingredients like raisins or dried cranberries, you might find the cookies sweet enough without any additional sweetener. If you prefer a sweeter cookie or are using less sweet add-ins like nuts or seeds, consider adding a touch of maple syrup, honey, or a sugar alternative to the banana-oat mixture (start with 1-2 teaspoons and adjust to taste).
  7. Bake Until Just Set: These cookies are best when they are just baked until the edges are lightly golden and the centers are set. Overbaking can lead to dry cookies. They will continue to firm up as they cool.
  8. Storage is Important: Store leftover cookies in an airtight container at room temperature for up to 3 days or in the refrigerator for up to a week. They tend to soften slightly over time due to the moisture from the bananas. For best texture, enjoy them within the first couple of days. You can also freeze them for longer storage; just thaw at room temperature before enjoying.

Frequently Asked Questions (FAQ)

Q1: Are these cookies really only 3 ingredients?
A: Yes, the base recipe is truly just 3 ingredients: ripe bananas, rolled oats, and optional add-ins. We’ve listed optional add-ins to enhance flavor and texture, but the core recipe requires only bananas and oats. It’s surprisingly simple!

Q2: Can I use quick oats instead of rolled oats?
A: Yes, you can use quick oats in a pinch, but the texture will be slightly different. Quick oats are more finely processed, so they absorb more moisture and may result in a slightly drier and less chewy cookie compared to using rolled oats. Rolled oats provide a better chewy texture and more substantial bite.

Q3: Are these cookies gluten-free?
A: Naturally, bananas are gluten-free. Rolled oats are also naturally gluten-free. However, oats are often processed in facilities that also handle wheat, leading to potential cross-contamination. If you need truly gluten-free cookies, be sure to use certified gluten-free rolled oats.

Q4: Can I make these cookies vegan?
A: Yes, these cookies are naturally vegan as they contain no animal products. The base recipe relies on bananas and oats, both plant-based ingredients. Ensure any optional add-ins you use are also vegan (e.g., vegan chocolate chips, nuts, seeds, dried fruit).

Q5: Can I freeze these oatmeal cookies?
A: Yes, these cookies freeze well. Allow them to cool completely after baking, then place them in a freezer-safe bag or container, separating layers with parchment paper if necessary. They can be frozen for up to 2-3 months. Thaw them at room temperature for about 30 minutes before enjoying.

Q6: My cookies are spreading too much. What did I do wrong?
A: There are a few reasons why your cookies might be spreading too much:
Bananas too ripe/wet: If your bananas are overly ripe and very wet, they might add too much moisture to the dough, causing spreading. Try using bananas that are ripe but not overly mushy.
Oven temperature too low: Ensure your oven is preheated to the correct temperature (350°F/175°C). A lower temperature can cause cookies to spread before they set.
Too much moisture in the oats: If your oats are slightly damp, they might contribute to extra moisture. Make sure your oats are dry.

Q7: My cookies are dry. How can I make them moister?
A: If your cookies are turning out dry, consider these adjustments:
Riper Bananas: Using riper bananas will add more moisture.
Less Oats: Try slightly reducing the amount of oats (start with ¾ cup instead of 1 cup) to create a moister dough.
Don’t Overbake: Bake the cookies until just set and lightly golden at the edges. Overbaking is the most common cause of dry cookies.

Q8: Can I add protein powder to these cookies?
A: Yes, you can experiment with adding protein powder to these cookies to increase their protein content. Start by adding 1-2 tablespoons of your preferred protein powder (vanilla or unflavored works well). You might need to adjust the amount of oats or add a touch of liquid (like a teaspoon of plant-based milk) to maintain the desired dough consistency, as protein powder can absorb moisture. Be mindful that protein powder can sometimes affect the texture, potentially making the cookies slightly drier or denser.

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3-Ingredient Oatmeal Cookies


  • Author: Sarah

Ingredients

Scale
  • 2 Ripe Bananas: The riper the bananas, the sweeter and more flavorful your cookies will be. Look for bananas with brown spots – these are perfect for baking as they are naturally sweeter and mash easily. They provide moisture and natural sweetness, acting as a binder in place of eggs and butter.
  • 1 Cup Rolled Oats (Old-Fashioned Oats): Use rolled oats, also known as old-fashioned oats. These provide the cookie’s structure, chewiness, and that classic oatmeal flavor. Quick oats can also be used in a pinch, but they might result in a slightly drier cookie. Avoid steel-cut oats, as they won’t cook properly in this recipe.
  • Optional Add-ins (To Taste): This is where you can get creative! While the cookies are delicious with just three ingredients, adding a few extras can elevate them to another level. Consider ingredients like chocolate chips, nuts, seeds, dried fruit, or spices. These additions allow you to customize the cookies to your taste and dietary preferences.

Instructions

  1. Preheat Your Oven and Prepare Baking Sheet: Preheat your oven to 350°F (175°C). Line a baking sheet with parchment paper or a silicone baking mat. This will prevent the cookies from sticking and make cleanup a breeze. Parchment paper is especially helpful for these cookies as they can be a little delicate.
  2. Mash the Bananas: In a medium-sized bowl, thoroughly mash the ripe bananas using a fork. You want to achieve a smooth, almost puree-like consistency, with only a few small lumps remaining. The mashed bananas will be the base of your cookie dough, providing moisture and sweetness.
  3. Combine Bananas and Oats: Add the rolled oats to the bowl of mashed bananas. Mix well with a spoon or spatula until the oats are evenly distributed and fully incorporated into the banana mixture. Ensure there are no dry pockets of oats remaining. The mixture should be thick and slightly sticky.
  4. Add Optional Ingredients (If Using): If you’re using any optional add-ins like chocolate chips, nuts, seeds, dried fruit, or spices, now is the time to gently fold them into the banana-oat mixture. Distribute them evenly throughout the dough. Don’t overmix at this stage.
  5. Scoop and Shape the Cookies: Using a spoon or a small cookie scoop, drop rounded tablespoons of the cookie dough onto the prepared baking sheet. Leave some space between each cookie, as they will spread slightly during baking. If you prefer flatter cookies, you can gently flatten them slightly with the back of a spoon. For thicker, chewier cookies, leave them in rounded mounds.
  6. Bake the Cookies: Place the baking sheet in the preheated oven and bake for 12-15 minutes, or until the edges of the cookies are lightly golden brown and the centers are set. Baking time can vary slightly depending on your oven and the thickness of your cookies. Keep an eye on them to prevent burning.
  7. Cool and Enjoy: Once baked, remove the baking sheet from the oven and let the cookies cool on the baking sheet for a few minutes before transferring them to a wire rack to cool completely. Cooling on the baking sheet helps them firm up a bit. These cookies are best enjoyed slightly warm or at room temperature. Store any leftovers in an airtight container at room temperature for up to 3 days or in the refrigerator for up to a week.

Nutrition

  • Serving Size: one normal portion
  • Calories: 180
  • Fat: 3g