These Butterfinger Bars are a blondie base with butterfinger cookie pieces and topped with a light and fluffy buttercream frosting! They are easy to make, and will be the highlight of your next party!
Looking for more desserts? Try this Sweet Chex Mix, Better Than Sex Cake, or Blintzes!
Why I love this recipe:
- The Frosting: Fluffy peanut butter frosting with crushed butterfinger candy bars in it; don’t think you can get better than that!
- Quick – Skip the scooping, rolling, chilling, and baking multiple batches that cookies require. This butterfinger dessert is quick and easy!
- Make Ahead Crowd Pleaser – They’re always a hit, and you can make them in advance of a gathering and store them in the fridge or freezer.
How to make Butterfinger Bars:
Make Batter: Cream together butter, brown sugar, and granulated sugar until smooth and light. Add vanilla and eggs and mix well. Mix in flour, baking soda, and salt. Stir in chopped Butterfinger bits.
Spread: Press dough into a lightly greased 9×13 inch baking pan.
Bake: Place pan in oven and bake at 350°F for 24-26 minutes, until the center of the bars are JUST set. Cool completely before frosting.
Make Frosting: Beat together peanut butter and butter on medium speed with an electric mixer until smooth. Add vanilla and mix. On low speed, add in the remaining ingredients, then increase the speed to medium-high and beat for 1-2 minutes, or until light and fluffy. Frost the butterfinger bars then sprinkle butterfinger bits on top.
Storage and Freezing Instructions:
To Store: Keep in an airtight container in the fridge for up to a week.
To Freeze: Cool butterfinger bars completely then flash freeze uncovered for 30 minutes to harden the frosting. Wrap tightly in plastic wrap and tinfoil. Freeze for up to a month.
More Popular Cookie Bars:
- Sugar Cookie Bars
- M&M Cookie Bars
- Snickerdoodle Bars
- World’s Best Peanut Butter Bars
- Magic Bars (7 Layer Bars)
- Oatmeal Cookie Bars
- Toffee Chocolate Chip Cookie Bars
- S’mores Bars
- Oreo Bars
- Salted Chocolate and Caramel Pretzel Bars
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Recipe
Butterfinger Bars
Ingredients
- 1 cup butter
- 1 cup light brown sugar
- 1/2 cup granulated sugar
- 1/2 teaspoon vanilla extract
- 2 large eggs
- 2 1/2 cups all-purpose flour
- 1 teaspoon baking soda
- 1/2 teaspoon salt
- 2 cups Butterfinger Bars about 15 “fun size” bars, coarsely chopped
For the Frosting:
- 3/4 cup creamy peanut butter
- 1/2 cup butter softened
- 1/2 teaspoon vanilla extract
- 1 1/2 cups powdered sugar
- 1-2 Tablespoons milk
- 1/2 cup chopped butterfinger bits about 4 “fun size” bars
Instructions
- Preheat oven to 350 degrees F.
- Add butter, brown sugar and granulated sugar to a mixing bowl and cream together until smooth and light. Add the vanilla and eggs and mix well.
- Add flour, baking soda and salt and mix on low speed until just combined. Stir in chopped Butterfinger bits.
- Smooth mixture into a lightly greased 9×13 inch baking pan. Bake for 24-26 minutes, until center of bars are set, and no longer glossy looking.
- Remove from oven and cool completely before frosting.
For the Frosting:
- Using an electric mixer, beat the peanut butter and butter on medium-speed until completely smooth. Add vanilla and mix.
- Reduce speed to low and add in the remaining ingredients, beating until fully incorporated. Increase speed to medium-high and beat the frosting for 1-2 minutes, or until light and fluffy.
Notes
Nutrition
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I originally shared this recipe September 2017. Post updated July 2022.
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These were amazing. Took them into work everyone loved them. 10/10! Even if you don’t like butterfingers it’s a must try.
Is it supposed to rise like a cake? Mine got very thick while yours look thinner. Also it’s taking a long time to bake..not sure what I’m doing wrong
Ridiculously good! These things sell like crazy at my cafe…I do add about half of the butterfingers as called in the brownie and only sprinkle it on top because its so rich. These are heavenly, thanks for sharing!
The 1/2 c butterfinger for the frosting, is that for sprinkling on top or mix in frosting?
Add it to the frosting (you can leave out a small handful if you want, to sprinkle on top as well).
This is the best recipe ever!! I loved it so much!!!
these are SO yummy. We ate them chilled at a hot swim meet, and everyone loved them.
Outstanding!!! I am surprised there are not more ratings and reviews for this recipe. I baked these in a glass 9×13 pan took them out at exactly 24 minutes because glass will hold the heat a little more than metal after it’s removed from the oven. This will become a party staple!
Butterfinger squares. The frosting directions end at step #2. What are the remaining steps? Do you let the bars cool, then spread on the frosting?
Yes! Refer to step 7 of the instructions, “Let bars cool completely, then spread on the frosting” Enjoy!!
Amazing! Very rich but ohhh so good! 😋
I was wondering if these can be made gluten free…almond flour maybe???
These cookie bars were so good! Shared them with friends and everyone loved them.
The consistency of the bar itself was perfect, and the frosting,…oh my!!!
Getting ready to make them again. YUMMY!
Can you freeze the butterfinger bars
Yes, sure.
Seriously so delicious!!!!!!!!
Made for the first time lasr Christmas. Just had a pleading request from my daughter to make them again. She is taking them to a “hurricane party” in sunny Sarasota, FL. Thanks so much for the recipe!!
Susan
Loved this recipe have requests to make it again
Delicious.
Do these need to be refrigerated because they have milk in the frosting?
They store best in the fridge. Enjoy!
Omg, I love butterfingers and so does my boss. I am goi g to make this as soon as i get paid. You ha e some delightful recipes. Will let you know but its a sure thing.?
Delicious, chewy, and perfect! I love this recipe!
Is it possible to make these ahead and freeze them?
Absolutely! They will freezer well. Just make sure to allow them time to cool completely before cutting and storing them.
This is so crazy! I just bought 3 packages of the funsize Butterfingers, and there are 6 bars in each pack! Just enough to make this recipe, and only 1 bar short for the frosting! It’s a sign!
It is a sign! I’d love to hear how you like them!
Thanks for sharing! I love trying new recipes.