Why You’ll Love This Recipe
- Only three ingredients: A short shopping list keeps baking simple.
- One bowl: Minimal equipment and cleanup.
- Quick preparation: The mixture comes together in minutes.
- Rich flavor: Peanut butter is the main ingredient.
- Small batch: An 8-inch square dish makes nine servings.
What Are Peanut Butter Blondies?
These peanut butter blondies are flourless dessert bars with a dense, chewy texture similar to a soft peanut butter cookie.
Brown sugar adds sweetness and a gentle molasses flavor. The egg binds the ingredients and helps the bars set as they bake. Without flour or a raising agent, they remain compact rather than becoming fluffy like cake.
Ingredients You’ll Need
Creamy Peanut Butter
Use one cup of conventional creamy peanut butter for consistent results. Choose a variety that stays blended in the jar.
Natural peanut butter that separates can change the texture, producing bars that are more oily or crumbly.
Light Brown Sugar
One packed cup of light brown sugar sweetens the bars and contributes to their chewy texture.
Press it into the measuring cup, then level the top.
Egg
One large egg holds the mixture together and provides structure during baking.
How to Make 3-Ingredient Peanut Butter Blondies
1. Prepare the Oven and Dish
Preheat the oven to 350°F (175°C). Lightly grease an 8-by-8-inch baking dish or line it with parchment paper.
Leave parchment extending over two sides if you want to lift the cooled blondies out before slicing.
2. Mix the Ingredients
Stir the peanut butter, packed brown sugar, and egg together until thoroughly combined.
Scrape the bottom and sides of the bowl so no streaks of egg or pockets of sugar remain. The mixture will be thick and dough-like.
3. Press into the Dish
Transfer the mixture to the prepared dish. Press into an even layer and smooth the top.
If it sticks to your spatula, place a piece of parchment over the mixture and press gently. Remove that top sheet before baking.
4. Bake
Bake for 20–25 minutes, beginning to check at 20 minutes.
The edges should be lightly golden and the center should look set. Avoid waiting for the bars to become firm throughout while still in the oven; they continue setting as they cool.
5. Cool Completely
Place the dish on a cooling rack and let the blondies cool completely before lifting or slicing.
This step helps the bars hold together. Cut into nine squares with a sharp knife.
Tips for Chewy Peanut Butter Bars
Use Consistent Measurements
The balance of peanut butter, sugar, and egg matters in a recipe with so few ingredients. Avoid changing quantities without expecting a different texture.
Choose the Right Dish Size
An 8-inch square dish gives the intended thickness. A larger dish produces thinner bars that may bake faster.
Spread Evenly
An uneven layer can leave dry edges and a softer center. Press the mixture into the corners before baking.
Check Early
Ovens and baking dishes vary. Begin checking at 20 minutes and use the appearance of the bars as your guide.
Allow Enough Cooling Time
These bars are delicate while warm. Cooling fully is essential for neat squares.
Optional Variations
The original recipe needs only three ingredients, but small additions can change the flavor.
Chocolate chips: Fold in a small handful before pressing the mixture into the dish.
Vanilla: Add a little vanilla extract for a warmer flavor.
Chopped peanuts: Sprinkle finely chopped peanuts over the top for extra texture.
Chocolate drizzle: Drizzle melted chocolate over the cooled bars and allow it to set before serving.
Keep additions modest so the mixture remains easy to press and slice.
Serving Ideas
Enjoy a square with coffee, tea, or a glass of milk. For dessert, serve with vanilla ice cream or a little chocolate sauce.
For smaller portions, cut the batch into 16 pieces instead of nine. Let the bars cool fully before arranging them on a platter.
When sharing, clearly identify that they contain peanuts and egg.
Storage and Freezing
Room Temperature
Store completely cooled blondies in an airtight container at room temperature for up to three days. Keep them in a cool location away from sunlight.
Refrigerator
Refrigerate for up to five days. Let a portion stand briefly at room temperature before serving if you prefer a softer bite.
Freezer
Wrap individual squares and place them in a freezer-safe container. Freeze for up to two months.
Thaw while wrapped to help keep them from drying out.
Frequently Asked Questions
Do these blondies contain flour?
No. Peanut butter, brown sugar, and an egg are the only ingredients.
Can I use natural peanut butter?
Conventional creamy peanut butter is recommended. Natural varieties differ in consistency and can affect how well the bars hold together.
Can I use crunchy peanut butter?
You can try it, although the peanut pieces change the texture and may make slicing more delicate.
Why are my blondies crumbly?
They may have been overbaked or cut while warm. Peanut butter type and measurement differences can also affect the result.
Why are they soft straight from the oven?
The bars firm as they cool. Look for set centers and lightly golden edges, then allow complete cooling before slicing.
Can I double the recipe?
Yes. Double the ingredients and use a 9-by-13-inch dish. The thickness will differ slightly, so check early and adjust baking time as needed.