Home > Uncategorized > Post 6/13 – Peanut Butter Oatmeal Cookie Bars

Post 6/13 – Peanut Butter Oatmeal Cookie Bars

This is a quick bar cookie, great for potlucks, bake sales, etc.  Usually, I have most of the ingredients in the pantry.  It is a good recipe for using bulk ingredients that you might buy at Costco (with just two of us, getting through huge bags of brown sugar, chocolate chips, and oatmeal can prove challenging).

Peanut Butter Oatmeal Cookie Bars 

1 cup salted butter (2 sticks), softened  (or unsalted butter)

2 cups light brown sugar, packed

½ cup peanut butter (creamy or chunky, natural is ok, but it works better if it isn’t separated)

1 teaspoon vanilla

2 eggs

3 cups oats (I prefer old-fashioned for the texture, but quick oats will also work)

½ cup all-purpose flour (or gluten-free flour)

1 teaspoon baking soda

1 teaspoon baking powder

1 teaspoon salt

2 cups chocolate chips*

Preheat oven to 350º F. Use an electric mixture to cream the butter and brown sugar (if the butter is soft enough, hand mixing is fine).  Add the peanut butter and vanilla and beat well.  Beat in the eggs, one at a time.

Add the oats, flour, baking soda, baking powder, and salt.  Stir well.  I do this step by hand so the oats don’t get broken up as much.  Stir in the chocolate chips. Spread in an even layer in a 12″x18″x2″ sheet cake pan lined with parchment paper (I use the butter wrappers to grease the parchment paper and then I use the wrappers to press the mixture into the pan).  You can also bake them in muffin tins to make little individual bars. Bake for about 20-30 minutes, until golden brown and a toothpick comes out clean (it depends on your oven, the pan, etc.).

Decrease the chocolate chips and add some shredded coconut or chopped peanuts.  Or you can substitute other ingredients for the chocolate chips:   mini or regular M&Ms, mini Reese’s Peanut Butter Cups, chocolate covered raisins, Reese’s Pieces, toffee bits, butterscotch chips, or peanut butter chips.


  1. January 11, 2012 at 12:41 pm

    Katie, are these all your recipes and do you take the photos? You’re going to be discovered one of these days!

    • January 11, 2012 at 12:49 pm

      Thanks, Bonnie. Yep, most are my recipes. I get inspiration from other recipes, cooking shows, NPR’s Splendid Table, cookbooks, etc. So far these are mine (except for the sweet potato cake I got it from an elderly neighbor years ago and my friend’s grandmother’s snickerdoodles). Not sure how it would work if I used someone else’s recipe? Guess you just ask permission and give them credit?!? Rarely do I follow recipes, I’m more of a recipe tweaker.

      Unfortunately the photos are mine. I can take photos of landscapes, people, etc. But not food! My photography is what keeps getting me rejected from other food sites. It’s almost worth taking a class or paying someone for photos. Hmmm…will trade food for photos!

      Thanks again for the feedback!! You might see these at a potluck in the future.

  2. Cyndia
    January 13, 2012 at 10:58 am

    Katie, wanted to give you a follow-up on my making these. I took them to my MG meeting last night and even though we had tons of food there, most of them (thankfully not all!) disappeared! I’m having a couple for breakfast this morning because…oatmeal, right? :-). I have a feeling these will be a staple in our household now.

    • January 13, 2012 at 11:08 am

      Yay, glad they were a hit! True, they include oatmeal so it sounds like a perfectly fine breakfast to me :)

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