These peanut butter fudge bars—often called “can’t-leave-alone bars”—start with a cake mix base and a fudgy sweetened condensed milk center. They’re easy to make ahead, ideal for potlucks, bake sales, and holiday dessert trays, and freeze well for future treats.
If I had to pick my favorite cookie bar recipe, these peanut butter fudge bars would be at the top. I first tasted them years ago and they quickly became a family staple. My grown sons now make them in their own kitchens—testimony to how reliably delicious these bars are.
The bars are layered and richly flavored: a peanut butter cookie-like base and crumbly topping surround a gooey chocolate center made with sweetened condensed milk and chocolate chips. Because they’re so irresistible, they earned the nickname can’t-leave-alone bars. Whether you need a dependable dessert for gatherings or a quick bake-sale item, these are always a crowd-pleaser.
Peanut Butter Fudge Bars — Ingredients
Below are the ingredients used to make these peanut butter fudge bars from cake mix. The amounts below match the printable recipe card in the original post.
- 1 package yellow or white cake mix
- 1 cup creamy peanut butter
- 1 egg
- ½ cup vegetable or canola oil
- 1 can sweetened condensed milk
- 1 cup semi-sweet chocolate chips (or your preferred chocolate chips)
- 2 tablespoons butter
Peanut Butter Fudge Bars Recipe
These peanut butter fudge bars combine a simple cake-mix crust with a sweetened condensed milk chocolate layer for a tender, fudgy bar that’s perfect for sharing and freezing.
Ingredients (with amounts)
- 1 package yellow or white cake mix
- 1 cup creamy peanut butter
- 1 egg
- ½ cup vegetable or canola oil
- 1 (14 oz) can sweetened condensed milk
- 1 cup semi-sweet chocolate chips (or your favorite)
- 2 tablespoons butter
Instructions
Step 1: Preheat the oven to 350°F (175°C). In a large bowl, combine the cake mix, creamy peanut butter, egg, and vegetable oil. Stir until a thick dough forms.
Step 2: Reserve about one-third of the dough for the topping. Press the remaining two-thirds evenly into a greased 9 x 13 inch baking pan. Bake the crust for about 10 minutes—just to set.
Step 3: While the crust bakes, melt the chocolate layer. Combine the sweetened condensed milk, chocolate chips, and butter in a microwave-safe bowl or in a saucepan over low heat. Stir until smooth and fully melted.
Step 4: Pour the melted chocolate and condensed milk mixture evenly over the partially baked crust. Take the reserved dough and pinch or rub small bits between your fingers to create a crumbly topping; sprinkle these crumbs over the chocolate layer.
Step 5: Bake for 20–25 minutes more, or until the top is just turning golden brown. Remove from the oven and allow to cool slightly. For the cleanest slices, cut the bars while they are still a bit warm.
Nutrition Information (per serving)
Yield: 12 servings. Serving size: 1 bar.
- Calories: 364
- Total Fat: 30g (Saturated Fat: 8g, Unsaturated Fat: 22g)
- Cholesterol: 22mg
- Sodium: 146mg
- Carbohydrates: 24g (Fiber: 2g, Sugar: 17g)
- Protein: 7g
Step-by-step photos
Tips for Perfect Peanut Butter Fudge Bars
- The topping dough is thick—work with small amounts and rub between your fingers to form crumbs.
- Avoid overbaking. Remove the bars when the top is just turning golden brown so the center stays fudgy.
- Slice bars while still slightly warm for neat edges and easier serving.
- These bars freeze exceptionally well; wrap tightly and store in the freezer for make-ahead treats.
Enjoy these classic peanut butter fudge bars warm or at room temperature. They make a great addition to holiday dessert trays, school fundraisers, and casual get-togethers.
FAQs
Why are these called “can’t-leave-alone bars”?
Because they’re so tempting you’ll likely reach for another piece after the first—hence the playful name.
Can I use white or yellow cake mix?
Yes. Either white or yellow cake mix works well as the base.
Can I freeze these bars?
Yes. Freeze cooled bars in an airtight container or wrapped tightly for best results.
How do I get clean cuts?
Slice while the bars are slightly warm and use a sharp knife cleaned between cuts for neat portions.
More baking recipes you may enjoy
- Peanut Butter Chocolate Chip Cookies — a quick, mixer-free cookie recipe
- Texas Brownies — classic brownies that can be frosted right away
- Oatmeal Chocolate Chip Cookies — soft, chewy cookies great for lunches and snacks
- Apple Cookies with Vanilla Glaze — an heirloom recipe that’s perfect for using fresh apples
Save and share
Pin or bookmark this recipe so you can find it when planning desserts for holidays, parties, or everyday baking. These peanut butter fudge bars are timeless, simple to prepare, and always welcome at any gathering.
