Oatmeal Cookie Fudge Bars

Oatmeal Cookie Fudge Bars are so delicious and easy to make, perfect for the holidays or any time of the year!

Made with crushed Dad’s oatmeal cookies as the base, covered with a gooey chocolatey layer then topped with crushed walnuts, this treat really hits the mark! Its an easy no bake dessert recipe that will definitely become a favorite in your home.

Oatmeal Cooke Fudge Bars on a wooden board, with more bars in the background

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This is my mother-in-law’s recipe and one of my husband’s favorite treats. He recalls his mom adding these squares to her Christmas dessert platter, and that they were always the first ones to go!

Best No Bake Recipe!

  • Using simple pantry ingredients, this no bake recipe is quick and easy to make!
  • This is a tried and true recipe that has stood the test of time.
  • These fudge bars have the perfect combination of flavors and textures that will leave you wanting more.
process to crush cookies and press into a baking pan, to make Oatmeal Cookie Fudge Bars

Easy 2 Layer Dessert

  • COOKIE BASE: Crushed Dad’s oatmeal cookies mixed with melted butter form the base for this recipe. Super easy to make, and so delicious.
  • FUDGE LAYER: Using just a few ingredients like chocolate, butter, powdered sugar, walnuts, vanilla and an egg, this gooey and fudgy layer is hard to resist!

Substitutions

  • There really is no substitute for the Dad’s cookies in this recipe, but there are some with chocolate chips in them which would work too.
  • Semi sweet chocolate chips work well instead of squares. In fact they melt even faster!
  • The unsweetened chocolate helps keep the fudge layer from being too sweet. If a sweeter bar is desired, use semi sweet chocolate for the entire 4 ounces.
  • Pecans are a great substitute for walnuts, or omit them altogether.
  • Use nuts for the topping, or reserve a bit of the cookie base to sprinkle on top.

Oatmeal Cookie Fudge Bars in a pan, one with walnuts on top and one without

How to Make Fudge Bars

  1. Crush the cookies and mix with melted butter.
  2. Press firmly into an 8×8″ pan and bake for 10 minutes. Cool.
  3. Melt butter with chocolate in a saucepan.
  4. Add powdered sugar, vanilla and walnuts. Mix – it will be thick.
  5. Beat egg and blend into chocolate mixture.
  6. Cook for 3 minutes, pour over cookie base. Sprinkle with more walnuts.
  7. Refrigerate until firm, remove from pan and cut into squares.
Two Oatmeal Cookie Fudge Bars stacked on top of each other, on a wooden board

Recipe Tips!

  1. Line baking pan with parchment paper or foil to make removal, and clean up, super easy.
  2. A food processor works best to crush the cookies, but a zippered bag and rolling pin (or mallet) works in a pinch!
  3. Firmly press the cookie base down before baking to prevent it from crumbling.
  4. Once chilled and firm, remove the entire slice onto a cutting board and cut into desired sizes.

Storage Ideas!

  1. Store these cookie bars in a covered container in the refrigerator for about a week, or at room temperature for 3-4 days.
  2. This recipe is definitely freezer-friendly, so make a double batch and freeze for quick and easy grab and go treats or for last minute guests.
  3. An ice cream pail makes a great container to store all your freezer treats, plus is a great way to recycle!
Two Oatmeal Cookie Fudge Bars stacked on top of each other, the top with a bite taken out of it.

I truly hope you find success with this Oatmeal Cookie Fudge Bars recipe! I made it the other day and literally, it’s gone!

Other Easy Dessert Bars to Try!

Oatmeal Cooke Fudge Bars on a wooden board, with more bars in the background
5 from 1 vote

Oatmeal Cookie Fudge Bars

Servings 16 servings
Prep 20 minutes
Cook 3 minutes
Refrigerate 2 hours
Total 2 hours 23 minutes
These oatmeal cookie bars made with a decadent fudge layer are hard to resist!

Equipment

  • 8 x 8" baking pan
  • saucepan
  • parchment paper

Ingredients
  

Base

  • 320 grams Dad's cookies (or 27 cookies), crushed
  • ½ cup butter melted

Chocolate layer

  • ¼ cup butter
  • 3 ounces semi sweet chocolate
  • 1 ounce unsweetened chocolate
  • 1 ½ cup powdered sugar (icing sugar)
  • 1 egg
  • ¾ cup walnuts divided
  • 1 Tablespoon vanilla
  • ½ teaspoon instant espresso powder optional

Instructions
 

Base and topping

  • Combine the crushed cookies and ½ cup melted butter.
  • Press into an 8×8" pan and bake 10 min at 350ËšF. Remove from oven and cool on rack.

Chocolate layer

  • In a saucepan over medium low heat, melt ¼ cup butter and semi sweet chocolate squares. Stir till well blended. Remove from heat.
  • Add ½ cup walnuts, icing sugar, vanilla and espresso powder (if using) and mix. It will be thick. 
  • Beat egg and add to chocolate mixture. Blend together well, then return to medium heat and cook for 3 minutes stirring constantly.
  • Pour over cooled base. Then sprinkle remaining ¼ cup of the walnuts over the top. 
  • Refrigerated until set then cut into squares. 

Notes

  • A food processor is recommended to crush the cookies. Alternately put cookies in a zippered bag and crush with a rolling pin.

Nutrition

Calories: 305kcalCarbohydrates: 28gProtein: 3gFat: 21gSaturated Fat: 9gPolyunsaturated Fat: 5gMonounsaturated Fat: 5gTrans Fat: 1gCholesterol: 33mgSodium: 144mgPotassium: 94mgFiber: 1gSugar: 18gVitamin A: 302IUVitamin C: 1mgCalcium: 17mgIron: 1mg

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Oatmeal Cooke Fudge Bars on a wooden board, with a title

Two Oatmeal Cookie Fudge Bars stacked up on each other, the top with a bite taken out, with a title
Two Oatmeal Cookie Fudge Bars stacked up on each other with a title
Oatmeal Cooke Fudge Bars on a wooden board, with writing
Fudge Oatmeal Cookie Bars on a wooden board, and a pan of the cookie bars under the title

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