Ingredients (Clearly Listed for Easy Reference)
- 1 box Pillsbury Zero Sugar Chocolate Fudge Brownie Mix
- Ingredients required on the box (typically water and eggs)
- Unsweetened applesauce, used as a 1:1 replacement for oil
- 2 servings PB2 powdered peanut butter
- Water (to prepare PB2, according to package directions)
- PAM Baking Spray or similar non-stick spray

Ingredient Notes
Unsweetened applesauce should always be used, as sweetened versions can alter both flavor and nutritional values. PB2 should be mixed until smooth but not runny, ensuring it holds definition when swirled into the batter.
A non-stick baking spray with flour is highly recommended to prevent sticking, especially since reduced-fat batters tend to cling more than traditional ones.
Step-by-Step Instructions
Step 1: Preheat and Prepare
Preheat your oven to the temperature specified on the brownie mix package, typically 325°F or 350°F. Prepare a 9×13-inch baking pan by coating it evenly with PAM baking spray. Set aside.
Step 2: Prepare the Brownie Batter
In a large mixing bowl, combine the zero-sugar brownie mix with the required eggs and water as instructed on the box. When the recipe calls for oil, substitute the same amount with unsweetened applesauce.
Step 3: Mix Until Smooth
Stir the batter gently but thoroughly until no dry pockets remain. Avoid overmixing, as this can lead to dense or rubbery brownies, especially when using oil substitutes.
Step 4: Prepare the Peanut Butter Swirl
In a separate small bowl, prepare two servings of PB2 by mixing the powder with water according to package instructions. The consistency should be smooth and slightly thick, similar to natural peanut butter.
Step 5: Assemble the Batter
Pour the brownie batter evenly into the prepared baking pan, smoothing the surface with a spatula to ensure even thickness throughout.
Step 6: Add the Peanut Butter
Drop spoonfuls of the prepared PB2 mixture evenly across the surface of the brownie batter. Aim for balanced distribution to ensure peanut butter flavor in every serving.
Step 7: Create the Swirl
Using a butter knife or skewer, gently swirl the PB2 into the brownie batter. Use slow, deliberate motions to create a marbled effect without over-mixing the layers.
Step 8: Bake
Place the pan on the center rack of the oven and bake according to the brownie mix instructions. Baking times typically range from 20 to 30 minutes depending on oven and pan type.
Step 9: Test for Doneness
Insert a toothpick into the center of the brownies. It should come out with a few moist crumbs but no wet batter. Avoid overbaking to preserve a fudgy texture.
Step 10: Cool Completely
Allow the brownies to cool in the pan for at least 20–30 minutes before slicing. Cooling is essential for structure, especially in reduced-fat baked goods.
Texture, Flavor, and Appearance
These brownies are rich, chocolate-forward, and moist, with a subtle fruity undertone from the applesauce that enhances rather than competes with the cocoa. The peanut butter swirl adds depth, visual appeal, and a nostalgic flavor contrast.
Nutritional and Lifestyle Benefits
This recipe significantly reduces fat and sugar while preserving satisfaction. Applesauce lowers calorie density, PB2 minimizes fat content, and the zero-sugar mix keeps sweetness controlled without sacrificing taste.