Oatmeal Creme Pie Cookie Bars (Little Debbie Copycat)

Little Debbie Oatmeal Creme Pies were some of my favorite cookies growing up and I could eat a box in a day.

But these bars are even better.

Oatmeal Creme Pie Cookie Bars (Little Debbie Copycat) -The flavor of the classic cookies turned into fast, easy, chewy bars and the frosting is beyond amazing! They're even better than original Oatmeal Creme Pies!!

In doing research for this recipe I bought a box of Oatmeal Creme Pies. It had been nearly 20 years since I last tried them and unfortunately what I bit into didn’t match my beloved memories. I made it my mission to create a new oatmeal creme cookie recipe that’s worth biting into and I think is better than the original.

I have so many oatmeal cookie recipes because when oatmeal cookies are done right and by that I mean soft, chewy, and not over-baked they’re some of my favorites. The chewiness, the perfectly hearty texture, and the nuttiness of the oats speak to me.

MY OTHER RECIPES

Rather than go to the fussiness of making sandwich cookies to recreate the classic Little Debbie cookies, I made bars. Bars are so much faster and easier than cookies since there’s no dough to chill and nothing individual to roll.

Oatmeal Creme Pie Cookie Bars (Little Debbie Copycat) -The flavor of the classic cookies turned into fast, easy, chewy bars and the frosting is beyond amazing! They're even better than original Oatmeal Creme Pies!!

The bars are soft, very chewy from the oats, not at all cakey, and perfectly dense. It’s one-bowl, no-mixer batter and you’ll have it from the bowl and into the oven in less than five minutes with only one bowl to wash. Love that.

Use quick-cook oats rather than old-fashioned for the perfect amount of chewiness. There’s a bit of molasses and cinnamon for extra depth of flavor and the frosting is truly the icing on this cake.

You can halve the frosting portion if you’re not a huge frosting person, but I am. The more the merrier. It’s buttercream frosting spiked with a jar of marshmallow creme and makes the bars taste truly authentic. It’s sweet, decadent, soft, fluffy, sticky, rich, and you’ll want to eat it by the spoonful.

Oatmeal Creme Pie Cookie Bars (Little Debbie Copycat) -The flavor of the classic cookies turned into fast, easy, chewy bars and the frosting is beyond amazing! They're even better than original Oatmeal Creme Pies!!

Oatmeal Creme Pie Cookie Bars (Little Debbie Copycat)

Rather than go to the fussiness of making sandwich cookies to recreate the classic Little Debbie cookies, I made bars that taste better than the original. Bars are so much faster and easier than cookies since there’s no dough to chill and nothing individual to roll. The bars are soft, very chewy, not at all cakey, and perfectly dense. Use quick-cook oats rather than old-fashioned for the perfect amount of chewiness. There’s molasses and cinnamon for extra depth of flavor and the frosting is truly the icing on this cake and makes the bars taste authentic. You can halve the frosting portion if you’re not a huge frosting person. It’s buttercream frosting spiked with a jar of marshmallow creme and makes the bars taste truly authentic. It’s sweet, decadent, soft, fluffy, sticky, rich, and you’ll want to eat it by the spoonful.

Ingredients:

Bars

  • 1/2 cup unsalted butter, melted
  • 1 large egg
  • 1 cup light brown sugar, packed
  • 2 tablespoons medium, dark, or full-bodied molasses
  • 1 tablespoon vanilla extract
  • 1/2 teaspoon salt
  • 1/4 teaspoon cinnamon
  • 1 cup instant oats (not old-fashioned or whole-rolled)
  • 3/4 cup all-purpose flour

Frosting (can be halved)

  • 1/2 cup unsalted butter, softened
  • 1 1/2 cups confectioners’ sugar
  • one 7-ounce jar marshmallow creme
  • 1/4 to 1/2 teaspoon salt (cuts some of the sweetness)

Directions:

  1. Bars – Preheat oven to 350F. Line an 8-by-8-inch baking pan with aluminum foil, spray with cooking spray; set aside.
  2. In a large, microwave-safe bowl melt the butter, about 1 minute on high power.
  3. Wait momentarily before adding the egg so you don’t scramble it. Add the egg, brown sugar, molasses, vanilla, salt, cinnamon, and whisk until smooth.
  4. Add the oats and stir to combine.
  5. Add the flour and stir until just combined, don’t overmix.
  6. Turn batter out into prepared pan, smoothing the top lightly with a spatula. Bake for about 24 to 25 minutes, or until done. A toothpick inserted in the center should come out clean, or with a few moist crumbs, but no batter. Place pan on top of a wire rack to cool completely before frosting. Don’t frost warm bars or the frosting will melt.
  7. Frosting – To the bowl of a stand mixer fitted with the paddle attachment (or large bowl and electric hand mixer), add the butter, confectioners’ sugar, and beat on medium-high speed (start on low so you don’t spray sugar everywhere) until light and fluffy, about 3 minutes.
  8. Stop, scrape down the sides of the bowl, and add the marshmallow creme, salt, and beat on medium-high speed until well combined, about 1 minute.
  9. Turn frosting out over bars and lightly smooth it with a spatula or offset knife. Bars will keep airtight at room temperature for up to 5 days. I’m comfortable storing buttercream-style frosting at room temp but if you’re not, refrigerate the bars noting they’ll be more prone to drying out in the fridge.
Only Eats

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47 comments on “Oatmeal Creme Pie Cookie Bars (Little Debbie Copycat)”

  1. I literally love everything on your website and each year I blow out my birthday candles I wish for a friend with have the delicious arsenal of goodies (and non-goodies) you have. Unfortunately, it’s not happening soon. I finally had all the ingredients to make these. It’s been on my to do list for some time., but I can never remember molasses. These are AMAZING. My husband asked why I always am making things. Simple. I know he is going to root through the cabinet later for some prepacked yuck food. I’d rather make these (super easy by the way-yay) and have him eat half a pan, then a box of the chemical laden ones. Thanks for such a delicious recipe. As always YUMMMMMMM

    • Hi Jen, long time no talk! :) Thanks for saying hi and for trying the recipe and I’m glad it came out great for you! And amen for when we can make things from scratch and save our families from rooting through the cabinets looking for whatever they can scrounge up!

  2. I know you just posted these yesterday, but as soon as I read your post, I knew I had to have them. So I went out to the store today to buy some instant oats, molasses, and marshmallow cream.

  3. Wow this recipe is life changing, absolutely delicious! I used 2 5″ round cake pans and made it into a GIANT oatmeal creme pie for my husband! Thanks!

  4. Yummy and tasty creme pie cookie bars. my all time favorite.

  5. looks like tasty and funny “creme pie cookie bars”. Enjoy!!

  6. Making these today. I have homemade buttercream frosting leftover from my son’s birthday cake.

  7. Hello, I would like to thank you for your amazing and awesome blog. That is totally awesome. I also made it at home and your recipe is too good. Please update me if you update the new recipe. I loved it very much. Thank you so much for the lovly blog.

    • There’s an email signup for recipes at the top of every page. HUGE. Enter your email address if you want free recipes.

      Thanks for trying the recipe and I’m glad it came out great for you!

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