These High Fiber Brownies start with a simple boxed brownie mix and get a big boost from All-Bran cereal for a soft, chocolatey treat with extra fiber. They’re easy to mix in one bowl, bake up perfectly in muffin cups, and make a great snack, lunchbox treat, or lighter dessert option the whole family can enjoy.
Add the All-Bran cereal and water to a large mixing bowl. Stir and let it soak for 5–15 minutes, until the cereal is softened and most of the water is absorbed.
Mix in the baking powder and brownie mix:
Sprinkle the baking powder over the softened cereal and stir to combine. Add the boxed brownie mix and stir until everything is well blended. The batter will be thicker and a little more textured than a regular brownie batter.
Fill the muffin cups:
Line muffin tins with paper liners or lightly spray with nonstick spray. Fill each cup about ½ full with batter—you want small, snack-size brownies.
Bake:
Bake at 350°F for about 20-25 minutes, or until the tops are set and a toothpick inserted in the center comes out mostly clean or with a few moist crumbs.
Cool and serve:
Let the brownies cool in the pan for a few minutes, then transfer to a wire rack to cool completely. Top with a dollop of light whipped topping, a drizzle of chocolate, or sprinkles if you’d like to dress them up.
Notes
Let the cereal soak in the water until softened before adding the brownie mix.
Fill muffin cups about halfway for small, snack-size brownies that bake evenly.
Start checking doneness a few minutes before the suggested bake time; ovens vary.
Store leftovers in an airtight container at room temp for 2–3 days, or refrigerate for up to 4–5 days.
Toppings like light whipped topping, chocolate drizzle, or sprinkles make these feel more like dessert while still keeping the fiber boost.