If you’re looking for a delightful dessert that’s both easy to make and a hit with everyone, these Oven Baked 5-Ingredient Peanut Butter Cup Brownie Bars are the way to go. With just five ingredients, you can whip up a sweet treat that combines rich brownies with creamy peanut butter cups. These bars are perfect for parties, family gatherings, or a simple indulgence at home.
Why Make This Recipe
There are many reasons to try this recipe. First, it requires only five ingredients, making it a quick and simple option for bakers of all levels. Second, the combination of brownies and peanut butter cups creates a delicious flavor that everyone loves. Lastly, it’s a versatile recipe that can be easily adjusted to suit your taste. With minimal prep and bake time, you can enjoy a warm, gooey dessert in no time!
How to Make Oven Baked 5-Ingredient Peanut Butter Cup Brownie Bars
Ingredients:
- 1 box brownie mix, family size for a 9×13-inch pan
- 2 large eggs
- 1/2 cup vegetable oil
- 1/4 cup water
- 20 to 24 mini peanut butter cups, unwrapped
Directions:
- Preheat your oven to 350°F. Lightly grease a clear glass 9×13-inch baking dish or line it with parchment paper for easier lifting and slicing.
- In a large bowl, stir together the brownie mix, eggs, vegetable oil, and water until fully combined. The batter will be thick.
- Spread about two-thirds of the brownie batter evenly into the prepared baking dish. Scatter the whole unwrapped mini peanut butter cups across the batter in an even layer.
- Drop the remaining brownie batter over the top in spoonfuls and gently spread it to partially cover the peanut butter cups. It’s okay to have some candy showing through.
- Bake for 30 to 35 minutes, or until the center is set. A toothpick inserted into the brownie portion should come out with moist crumbs but not wet batter.
- Allow the bars to cool completely before cutting them into squares. For cleaner slices, chill them for 30 minutes after cooling, then cut and serve.
Variations & Tips
- Use a different brownie mix: If you want a richer, chewier result, try using a fudge brownie mix.
- Add nuts: For some crunch, feel free to add chopped nuts to the batter before baking.
How to Serve Oven Baked 5-Ingredient Peanut Butter Cup Brownie Bars
These brownie bars are delicious on their own, but you can serve them with a scoop of vanilla ice cream or a drizzle of chocolate sauce for an extra special treat. You can also sprinkle some sea salt on top for a sweet and salty contrast.
How to Store Oven Baked 5-Ingredient Peanut Butter Cup Brownie Bars
To store leftover brownie bars, keep them in an airtight container at room temperature for up to 3 days. If you’d like to keep them longer, you can refrigerate them for up to a week. Just remember to let them come to room temperature before serving for the best texture and flavor.
Tips to Make Oven Baked 5-Ingredient Peanut Butter Cup Brownie Bars
- Make sure to grease the baking dish well to prevent sticking.
- Don’t over-bake the brownies; they should be soft in the center when cool.
- Feel free to experiment with different types of chocolate or nut butter cups for added variety.
Variations (if any)
You can customize these brownie bars by adding ingredients like marshmallows, caramel, or different types of candy. The possibilities are endless!
FAQs
1. Can I use homemade brownie batter instead of a mix? Yes, you can use homemade brownie batter if you have a recipe you love!
2. What can I substitute for the mini peanut butter cups? You can use chopped chocolate bars, chocolate chips, or any candy of your choice.
3. Can these bars be frozen? Absolutely! Just wrap them tightly in plastic wrap and place them in a freezer-safe container. They will last up to 3 months in the freezer.

Oven Baked 5-Ingredient Peanut Butter Cup Brownie Bars
Ingredients
Method
- Preheat your oven to 350°F (175°C) and lightly grease a 9x13-inch baking dish or line it with parchment paper.
- In a large bowl, stir together the brownie mix, eggs, vegetable oil, and water until fully combined. The batter will be thick.
- Spread about two-thirds of the brownie batter evenly into the prepared baking dish.
- Scatter the whole unwrapped mini peanut butter cups across the batter in an even layer.
- Drop the remaining brownie batter over the top in spoonfuls and gently spread it to partially cover the peanut butter cups.
- Bake for 30 to 35 minutes, or until the center is set. A toothpick inserted into the brownie portion should come out with moist crumbs but not wet batter.
- Allow the bars to cool completely before cutting them into squares. For cleaner slices, chill them for 30 minutes after cooling, then cut and serve.







