Peanut Butter Cake Mix Blondies
If you love peanut butter desserts, these Peanut Butter Cake Mix Blondies are a quick and delicious treat you’ll want to make again and again. They’re rich, soft, chewy, and packed with that classic peanut butter flavor.
The best part? This recipe starts with a box of cake mix, which makes baking incredibly simple. Since the cake mix already contains most of the dry ingredients, you only need a few additional items to create a thick blondie batter in minutes.
Peanut butter adds a creamy, nutty flavor and makes the blondies extra moist. They bake into perfectly chewy squares that are great for snacking, dessert tables, or afternoon treats.
If you want to make them even more indulgent, you can also drizzle melted chocolate or add peanut butter chips on top after baking.
Ingredients
• 1 box vanilla cake mix
• 2 large eggs
• ¼ cup vegetable oil or melted butter
• ½ cup creamy peanut butter
• 1 teaspoon vanilla flavoring extract
Optional toppings
• Peanut butter chips
• Chocolate chips
• Melted chocolate drizzle
Instructions
1. Preheat the oven
Preheat your oven to 175°C / 350°F. Line an 8x8-inch baking pan with parchment paper.
2. Mix the batter
In a large bowl, combine the cake mix, eggs, oil, peanut butter, and vanilla flavoring extract. Mix until a thick batter forms.
The batter will thicker than cake batter, which is normal for blondies.
3. Spread the batter
Transfer the batter to the prepared baking pan and spread it evenly with a spatula.
4. Bake
Bake for 15-18 minutes, or until the edges are lightly golden and the center is set.
Avoid overbaking so the blondies stay soft and chewy.
5. Cool completely
Allow the blondies to cool in the pan for about 20 minutes before slicing.
6. Optional decoration
For extra flavor, drizzle melted chocolate over the blondies or sprinkle peanut butter chips on top.
Cut into squares.
Tips for the Best Blondies
• Use creamy peanut butter
Creamy peanut butter blends smoothly into the batter and creates a better texture.
• Don’t overbake
Blondies should stay slightly soft in the center.
• Use parchment paper
This helps remove the blondies easily from the pan.
• Let them cool before slicing
Cooling helps the blondies firm up and hold their shape.
FAQ
1. Can I use crunchy peanut butter?
Yes. Crunchy peanut butter works well and will add small peanut pieces for extra texture.
2. What cake mix works best for peanut butter blondies?
Vanilla or yellow cake mix works best because it allows the peanut butter flavor to stand out.
3. Can I add chocolate chips?
Yes. Peanut butter and chocolate pair perfectly together. You can add ½ to 1 cup of chocolate chips to the batter.
4. How do I store peanut butter blondies?
Store them in an airtight container at room temperature for up to 3 days or refrigerate for up to 5 days.
5. Why is my blondie batter so thick?
Blondie batter is naturally thick. This thicker consistency helps create the dense, chewy texture that blondies are known for.