No Bake Peanut Butter Oatmeal Cookies (Quick & Delicious!)

Growing up, there was one thing I could count on every summer no bake cookies cooling on wax paper across our kitchen counter. My mom had a rule: if it was too hot to turn on the oven, it was time to break out the peanut butter and oats. I’d pull up a chair just to stir the pot (probably too early), sneak a spoonful when she wasn’t looking, and help drop little blobs of sweet, sticky goodness onto the tray.

Close up of a no bake peanut butter oatmeal cookie being held

These no bake peanut butter oatmeal cookies bring back all those memories with just one bite. They’re soft, chewy, rich with peanut butter, and ridiculously easy to make. No oven, no stress, no long ingredient list just pure comfort in cookie form. Whether you’re making them with kids or whipping up a quick sweet fix for yourself, this recipe is one you’ll come back to again and again.

In This Post

Why You’ll Love These No Bake Peanut Butter Oatmeal Cookies

No oven required – perfect for hot days or quick treats.
Made with simple pantry staples like oats, sugar, and peanut butter.
Easy to customize with chocolate chips, nuts, or coconut.
Gluten-free and dairy-free friendly with easy swaps.
Ready in under 45 minutes, start to finish!

Ingredients You’ll Need for this No Bake Peanut Butter Oatmeal Cookies

Here’s everything you’ll need to make these easy cookies:

Oats : Use quick oats for softness, rolled oats for chew. A mix of both works great!
Peanut Butter : Creamy works best. Natural peanut butter is okay, but texture may vary.
Sugar : White granulated sugar or swap with maple syrup or honey for a natural version.
Butter or Coconut Oil : Coconut oil works great for dairy-free versions.
Milk : Any milk will do (dairy or plant-based).
Vanilla Extract : For extra flavor.
Salt : Just a pinch helps balance the sweetness.

How to Make No Bake Peanut Butter Oatmeal Cookies

Quick Overview

➤ Boil sugar, butter, and milk
➤ Stir in peanut butter and oats
➤ Drop onto tray
➤ Let set until firm

Step by Step Instructions for Making No Bake Peanut Butter Oatmeal Cookies

Line a baking tray with parchment paper or wax paper.

In a saucepan, combine sugar, butter (or coconut oil), and milk. Bring to a rolling boil and boil for 1–2 minutes. If you have a candy thermometer, aim for 230°F (110°C).

Remove from heat and stir in peanut butter, vanilla, and salt until smooth.

Add the oats and stir until fully combined.

Drop spoonfuls of the mixture onto the lined tray using a cookie scoop or tablespoon.

Let the cookies cool and set at room temperature for 30 minutes, or refrigerate for 15 minutes if you’re in a hurry.

Closer look at no bake peanut butter oatmeal cookies showing texture

Additions & Variations

Chocolate chips: Mix in mini chocolate chips after the mixture cools slightly.
Coconut flakes: Add shredded coconut for texture and flavor.
Cinnamon: Add ½ tsp for warmth.
Chopped nuts: Stir in pecans or walnuts for extra crunch.
Drizzle: Once set, drizzle with melted chocolate for a fancier finish

Helpful Tips for the Perfect No Bake Peanut Butter Oatmeal Cookies

Don’t skip the boiling step—this helps the cookies set properly.
Use parchment or wax paper to prevent sticking.
Work quickly when scooping the mixture—it sets fast!
Let cookies cool fully before moving or stacking.

How to Store These Cookies

At room temperature: In an airtight container for up to 4 days.
In the fridge: Lasts for up to a week.
In the Freezer: Freeze in a single layer, then store in a freezer-safe container for up to 3 months.

Recipe FAQ’s

Why didn’t my no bake cookies harden?
You likely didn’t boil the sugar mixture long enough. Make sure it reaches a rolling boil for at least 1 minute or 230°F.

Can I use natural peanut butter?
Yes, but it’s softer and might affect how well the cookies set. Stir it well before using.

Are these cookies gluten-free?
Yes , just be sure to use certified gluten-free oats.

Can I use almond or cashew butter instead of peanut butter?
Absolutely! The flavor will change slightly, but they work great.