1. Make the Cookie Base
- In a saucepan over medium heat, combine butter, sugar, milk, and cocoa powder.
- Bring to a boil and cook for 1½–2 minutes, stirring constantly.
- Remove from heat and stir in peanut butter, vanilla, and salt.
- Fold in oats until fully coated.
2. Shape the Cookies
- Drop spoonfuls of the oat mixture onto a parchment-lined baking sheet.
- Flatten slightly with the back of a spoon.
- Let cool until set (about 15–20 minutes).
3. Prepare the Filling
- Beat together peanut butter and butter until smooth.
- Add powdered sugar gradually, mixing until creamy.
- Adjust texture with cream or milk until spreadable.
4. Assemble the Sandwich Cookies
- Spread filling over the flat side of one cookie.
- Top with another cookie to create a sandwich.
- Press gently so the filling spreads to the edges.
Serving Ideas
- Enjoy with a glass of cold milk for the ultimate treat.
- Pack in lunchboxes for a sweet surprise.
- Store in an airtight container in the fridge for up to 5 days.
Tips for Success
- For chewier cookies: Use old-fashioned oats instead of quick oats.
- For extra indulgence: Dip half of each sandwich in melted chocolate.
- Nut-free option: Swap peanut butter for sunflower seed butter or almond butter.
- Mess-free filling: Pipe the filling using a zip-top bag for neat layers.
Final Thoughts
These No-Bake Peanut Butter Oatmeal Sandwich Cookies are the perfect blend of nostalgia and indulgence. Soft, chocolatey, peanut-buttery, and creamy, they’re impossible to resist. Best of all, they’re easy, quick, and a guaranteed family favorite.