Peanut Butter Oatmeal Oreo Reese’s Cookies & Bars!

Peanut Butter Oatmeal Oreo Reese’s Cookies & Bars!

Do you like chocolate & peanut butter?

Well, I do!

Hands down, my taste-buds render chocolate and peanut butter the BEST food pairing ever. Hence, my continuous creation of chocolate and peanut butter treats!

Oreos & Reese's!
Oreos & Reese’s!

Peanut Butter Oatmeal Oreo Reese's CookiesTechnically, I’ve made the basic part of this recipe before (Chewy Oatmeal Peanut Butter Chocolate Chip Peanut Butter Cup Cookies); however, I changed a few things this time.

First, instead of adding 4 1/2 cups of old fashioned oats, I used 2 1/2 cups quick-cooking oats + 2 cups of pulverized oats (pour oats into blender or food processor and watch your oats turn into oat flour). This helped the cookies and bars to stick together better.

Then, I added different mix-ins: Oreos (well, actually, these were Trader Joe’s Joe Joe’s!) and Reese’s brand mini peanut butter cups. I put both of these into the food processor and pulsed until they were crushed up).

Finally, I added 2 cups of peanut butter instead of 1 3/4 cups. Why? Well, because you just cannot have enough!

Are you drooling yet? Get baking!

Peanut Butter Oatmeal Oreo Reese’s Cookies & Bars!

2 1/2 cups quick-cooking oats
2 cups pulverized oats (I measure after pulverizing)
2 tsp baking soda
1/2 tsp salt
1 stick butter (4 oz), softened
2 cups creamy peanut butter
1 cup granulated sugar
1 1/4 cups brown sugar, packed
3 eggs
1 tsp vanilla extract
1 12oz bag mini Reese’s cups, unwrapped
~15 Oreos or Trader Joe’s Joe Joe’s (or other chocolate sandwich cookie)


1) Preheat oven to 350 degrees F. If you want to make these into bars, line a 15 x 10 inch jelly roll pan and a 13 x 9 inch baking pan with foil. Spray the foil with cooking spray. If you want to make cookies, line baking sheets with parchment paper. (I made bars in the 15 x 10 inch jelly roll pan, and then used the remaining dough to make about 3 dozen cookies.

2) Whisk together the pulverized oats, baking soda, and salt. Set aside.

3) Put the Oreos in the food processor and pulse until slightly crushed. Put into a bowl and set aside. Then put the Reese’s cups in the food processor and pulse until the Reese’s cups are cut up. Set aside.

4) In a large bowl, beat together the butter, peanut butter, and sugars until creamy. Add in the eggs and vanilla and beat until smooth. Then add the pulverized oats mixture, mix in partially, and then add in the rest of the 2 1/2 cups of oats, Oreos, and Reese’s Peanut Butter Cups. You’ll probably have to switch from the mixer to to a wooden spoon as the dough gets thick.

4) If you’re baking bars, press the dough into the prepared pans and baking in the preheated oven for 15-20 minutes, or until just lightly browned. If making cookies, use a cookie scoop or 2 tablespoons to scoop the dough out onto the baking sheets. Flatten the cookies slightly and bake for 8-10 minutes — do not overbake! Trust me, they taste better under-baked than when over-baked.
Peanut Butter Oatmeal Oreo Reese's Cookie Bars!

5) Remove from the oven. For bars, cool in the pan on a baking rack. For cookies, allow them to sit on the baking sheet for 2-3 minutes and then transfer the cookies onto a cooling rack. As always, I recommend trying BOTH while they’re still warm & gooey!
Peanut Butter Oatmeal Oreo Reese's Cookie Bars!

Get ready for a chocolate-peanut-butter explosion!! 😀 

Perfect for potlucks and parties! OR, freeze some of them and just take one out whenever you want it! I tried this– they actually task great frozen!

Do you have a preference– bars or cookies?!