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3-Ingredient Peanut Butter Blondies: An Easy, Fudgy Treat

When you want something sweet and homemade without spending hours in the kitchen, these 3-Ingredient Peanut Butter Blondies are the perfect answer. They are rich, chewy, wonderfully peanut-buttery, and require only three basic ingredients.

Unlike traditional blondies, which usually call for flour, butter, brown sugar, eggs, and several flavorings, this simplified version keeps things incredibly straightforward. The peanut butter provides richness and structure, while the other two ingredients create the sweetness and binding needed for soft, satisfying squares.

The result is a dessert that feels effortless but still delivers that classic blondie experience: slightly crisp around the edges, soft in the center, and packed with peanut butter flavor.

Why You’ll Love These Peanut Butter Blondies

There is a lot to appreciate about such a simple recipe.

Only three ingredients: You don’t need a long shopping list or specialty ingredients.

Quick preparation: The batter comes together in just a few minutes.

Rich peanut butter flavor: Peanut butter is the star, giving every bite a nutty, creamy taste.

Soft and chewy texture: When baked correctly, the centers stay tender while the edges develop a pleasant firmness.

Beginner-friendly: There are no complicated techniques, making this a great recipe for anyone learning to bake.

The 3 Ingredients You’ll Need

The exact quantities are simple, but the ingredients you choose can make a noticeable difference in the finished blondies.

1. Peanut Butter

Use a smooth, conventional peanut butter for the most consistent texture. Natural peanut butter can sometimes separate, so if you use it, stir it extremely well before measuring.

Creamy peanut butter produces a smooth batter and evenly distributed peanut flavor. If you prefer a little texture, crunchy peanut butter can also work and will add small pieces of peanuts throughout the blondies.

2. Eggs

Eggs help bind the ingredients together and give the blondies their structure. They also contribute to the soft, slightly chewy texture.

For the best results, use eggs that are not ice-cold. Room-temperature eggs generally incorporate more easily into the peanut butter mixture.

3. Brown Sugar

Brown sugar supplies sweetness while contributing moisture and chewiness. Its caramel-like flavor also pairs beautifully with peanut butter.

Light or dark brown sugar can be used. Dark brown sugar will give the blondies a deeper molasses flavor and a slightly richer color.

How to Make 3-Ingredient Peanut Butter Blondies

Step 1: Prepare the Pan

Begin by preheating your oven to 350°F (175°C).

Line an approximately 8-inch square baking pan with parchment paper, leaving a little overhang on two sides. This makes it much easier to lift the finished blondies from the pan.

Lightly grease the parchment if desired.

Step 2: Combine the Peanut Butter and Brown Sugar

Place the peanut butter and brown sugar in a large mixing bowl.

Stir them together until the mixture becomes thick and relatively smooth. At first, the brown sugar may appear separate from the peanut butter, but keep mixing until the two ingredients are evenly combined.

This step is important because evenly distributing the sugar helps prevent overly sweet or dense pockets in the finished blondies.

Step 3: Add the Eggs

Add the eggs to the peanut butter mixture.

Whisk or stir thoroughly until the batter is completely combined. Scrape around the sides and bottom of the bowl as you mix so that no dry sugar remains hidden underneath.

The finished batter should be thick, glossy, and easy to spread.

Avoid mixing more than necessary once everything is evenly incorporated. Overworking the batter isn’t helpful here and can affect the final texture.