These 3 ingredient oatmeal cookies are my go-to when I need something quick, easy, and toddler-approved. Just banana, peanut butter, and oats — that’s it! They’re soft, naturally sweet, and perfect for a wholesome breakfast or snack when you’re short on time. Especially if you have a ripe banana that needs to be used up!
Why You'll Love These 3 Ingredient Oatmeal Cookies
- made with pantry staples – just banana, oats, and peanut butter (ingredients you probably already have on hand)
- naturally sweet (no added sugar!) – the ripe banana gives the perfect sweetness without needing syrup or sugar
- soft, chewy texture toddlers love – easy to gum, bite, and enjoy at any age
- perfect for baby-led weaning – nutrient-dense, simple ingredients make them great for little ones just starting solids
You'll also love my blueberry zucchini oatmeal cookies and fruit pizza oatmeal cookies for a fun, nutritious toddler treat!
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What You'll Need
- rolled oats: the base of these cookies that provides fiber and whole grains
- banana: the riper is better! acts as a natural sweetener and binder
- peanut butter: adds healthy fats, protein, and a little richness! sub with sunflower seed butter for allergy-friendly
See recipe card for quantities.
How To Make Your 3 Ingredient Oatmeal Cookies
- Preheat oven to 350°F (175°C) and line a baking sheet with parchment paper.
- In a bowl, mash the banana, then stir in peanut butter and oats until well combined.
- Scoop about 1-2 tablespoon of dough per cookie onto the baking sheet, flatten slightly, and bake for 10-12 minutes until golden brown.
- Let cool for 5 minutes before serving.
Hint
For the best texture, use a very ripe banana with brown spots. It mashes easily and adds natural sweetness, making the cookies soft and flavorful without extra sugar!
Substitutions
- peanut butter → use almond butter, cashew butter, or sunflower seed butter
- rolled oats → swap for quick oats for a softer texture
- banana → try unsweetened applesauce or pumpkin puree for a different flavor
These 3 ingredient oatmeal cookies are naturally gluten-free (if using GF oats), dairy-free, and egg-free!
Variations
These 3 ingredient oatmeal cookies are super easy to customize! Here are some ways you can mix it up:
- chocolate chip – stir in mini chocolate chips for a sweet touch
- cinnamon spice – add ½ teaspoon cinnamon and a pinch of nutmeg for warmth
- crunchy nut – fold in finely chopped walnuts or pecans for extra texture
- blueberry – fold in a handful of blueberries
How To Serve Oatmeal Cookies To Toddlers
- warmed up and paired with a smoothie for breakfast-on-the-go
- halved with fruit for snack time
- crumbled over yogurt or oatmeal
- packed into lunchboxes or snack trays (use sunflower butter for nut-free)
Equipment
You will need a mixing bowl, measuring utensils, baking sheet, and parchment paper to make these!
Storing Your 3 Ingredient Oatmeal Cookies
Store in an airtight container for up to 2 days at room temperature. Keep in the fridge for up to 1 week. Freeze in a sealed bag for up to 3 months. Thaw at room temp or microwave for 10-15 seconds before eating.
Tiff's Dietitian Tip
Get your little ones involved in helping you with these! Have them pour or stir the ingredients in the bowl.
FAQ
Yes! Swap peanut butter for sunflower seed butter or tahini.
Use a riper banana, or add 1 tablespoon honey or maple syrup.
Absolutely! Try adding chocolate chips, cinnamon, chopped nuts, or dried fruit for variety.
3 Ingredient Oatmeal Cookies
Equipment
Ingredients
- 1 ripe banana mashed
- ½ cup peanut butter or sub other nut/seed butter
- 1 cup rolled oats GF if needed
- ⅓-1/2 cup "mix-ins" optional! chocolate chips, chopped up pb candies, raisins, etc.
Instructions
- Preheat oven to 350°F (175°C) and line a baking sheet with parchment paper.
- In a bowl, mash the banana, then stir in peanut butter and oats until well combined. If adding mix-ins, then add those here!
- Scoop about 1-2 tbsp of dough per cookie onto the baking sheet, flatten slightly, and bake for 12-15 minutes until golden brown.
- Let cool for 5 minutes before serving.
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