This post may contain affiliate links. Please read our disclosure policy.
The recipe is finally here—GoGo’s Oatmeal Chocolate Chip Bars!!!

Named after my outstanding mother-in-law, whom we call GoGo, these bars are one of her specialties in the kitchen that everyone in her life knows and loves so very much! Growing up, my husband, Clayton, says that these oatmeal chocolate chip bars were a regular staple in their house and there was almost always a batch ready to be eaten at any given time. In fact, all of his high school friends know and love GoGo’s Oatmeal Chocolate Chip Bars and always rant and rave about how they loved them growing up! GoGo took them everywhere with her, and I completely understand why.
These chocolate chip bars are just about the easiest recipe to make, using limited ingredients and a box of yellow cake mix. It can be thrown together at any given time and taken to a friend in need of a little sweet treat, a potluck gathering or when hosting friends at your house.

While they are *fantastic* when warm or at room temperature, they are (arguably) better kept in the freezer and eaten straight out of there — a Snodgrass family secret! We carve them into squares, toss them in a ziplock and leave them in the freezer for a sweet treat whenever your heart desires or easily warmed up if that is what you prefer. But, if you do try our freezer trick, definitely let me know what you think!
want to make more of GoGo’s recipes? try these!

GoGo’s Oatmeal Chocolate Chip Bars
Ingredients
- 1 [15-ounce] box Miss Jones vanilla cake mix *use my code 20DEFINED for 20% off
- ½ cup avocado oil
- ¼ cup water
- 1 large egg
- 1 stick butter, softened
- ½ cup packed Miss Jones Smart Sugar *you can also use regular brown sugar here
- 2 cups old-fashioned rolled oats *do not use quick oats
- 1 [8-ounce] package of semi-sweet chocolate chips
Instructions
- Preheat the oven to 325 degrees and line a 9×13 metal baking pan with parchment paper.
- In a large mixing bowl with a paddle attachment, combine the avocado oil, water, egg, softened butter, smart sugar (or brown sugar if using) and only ½ of the bag of the vanilla cake mix. Mix at medium speed until well combined.
- Add the remaining cake mix and the oats. Mix over medium speed once more until just combined.
- Fold in the chocolate chips. Transfer to the parchment-lined baking pan and spread into an even layer using a rubber spatula.
- Transfer to the preheated oven and bake until the center has just set (you want it to still be pretty soft in the center so try to not over cook)– mine takes exactly 30 minutes. It might not look completely done, but once it has time to set it will be perfect and still chewy in the center.Allow the bars to cool completely, at least 30 more minutes, before lifting the parchment paper out of the baking dish and carving into squares.
Notes
- Quick oats does not work as an alternative in this recipe!
- 1:1 substitute for brown sugar
- I do not like plain coconut sugar as a sub in this recipe
- I have tried grain-free boxed yellow cake mix as an alternative and it did not work the same.
Nutrition information is automatically calculated, so should only be used as an approximation.




This is my favorite to make for a party !! Love this it’s clean ingredients and my friends love !!
So glad they are a hit!
Can these be frozen for post partum treats?
I saw that you said grain free cake mix doesn’t work but have you tested any gluten free cake mixes?
Yes, that should work fine. Miss Jones has a gluten-free mix and I know there are many others out there!
My family is obsessed with these! If I have coconut on hand I like to add a bit! I don’t have a metal 9×13 so I’ve just been using glass, but it takes almost a full hour compared to the 30 minutes you say yours takes. They come out super moist and gooey still. Does the type of pan make that big of a difference?
Yes, the type of pan can definitely make a difference as the metal retains heat differently than the glass! Love the coconut addition — yum.
These are amazing! We also enjoy them straight from the freezer.
One question: Is it okay to refreeze them after they’ve thawed out on the counter?
I tend to do this and have had no issues!
I don’t have a mixer wither with a paddle attachment- only a food processor and a hand held mixer tool. What do you suggest to use?
You can use a hand mixer up until the end, then fold in the choc chips, etc! Hand mixer should work fine here to really get the butter/sugar to combine. 🙂
Can I used a regular cake mix as a 1:1 switch for the cake mix the recipe calls for?
Yes, that will work fine!