4 Ingredient Flourless Brownies
These 4 Ingredient Flourless Brownies are dense, deeply chocolatey, and fudgy in a way that most flour-based brownies never quite achieve. The center stays soft and almost molten right out of the oven, then firms into a rich, fudge-like texture as the brownies cool.
Ripe banana provides all the sweetness so there is no refined sugar anywhere in the recipe, nut butter adds fat and richness in place of oil or butter, and dark chocolate chips melt throughout every square for chocolate flavor in every single bite. The whole batter comes together in one bowl with no mixer, no eggs, no flour, and no refined sugar, and the brownies bake in just 18 to 21 minutes!
What are 4 Ingredient Flourless Brownies?
4 Ingredient Flourless Brownies are baked brownies made without flour, eggs, refined sugar, or oil. The four base ingredients are mashed ripe bananas, all-natural creamy nut butter, cocoa powder, and protein powder. Dark chocolate chips fold into the batter for additional chocolate flavor. The brownies bake in an 8-inch square pan at 350 degrees Fahrenheit for 18 to 21 minutes and are intentionally fudgy and gooey in the center.
Ingredients
2 ½ cups mashed ripe bananas (about 5 medium bananas)
1 ½ cups all-natural creamy nut butter
½ cup protein powder
¼ cup cocoa powder
1 cup dark chocolate chips
What Makes This Recipe Different
Most flourless brownie recipes in this category use banana and nut butter as the base but stop there, relying on cocoa powder alone for chocolate flavor. This recipe adds a full cup of dark chocolate chips folded into the batter, so the chocolate flavor comes from two sources and every square contains pockets of melted chocolate rather than just a cocoa-forward base. The chocolate chips also contribute fat and richness to the finished texture in a way that cocoa powder alone cannot.
The bake time is another difference. Competing recipes run 25 to 45 minutes at the same temperature. This recipe bakes in 18 to 21 minutes, which produces a center that stays intentionally soft and gooey rather than baking through to a cakey or dense finish. The gooey center is a design choice, not underbaking. A toothpick with a few moist crumbs at 18 minutes is the correct done signal. A clean toothpick means the brownies have gone too far.
How to make 4 Ingredient Flourless Brownies, step by step
First, preheat your oven to 350 degrees Fahrenheit. Line an 8 inch by 8 inch square pan with parchment paper.
In a mixing bowl, combine the mashed bananas, peanut butter, cocoa powder, and protein powder. Stir until a dough is formed.
Fold in the chocolate chips.
Transfer this mixture into the lined pan. Smooth into an even layer.
Bake for 18 to 21 minutes, or until a toothpick inserted comes out with only a few moist crumbs.
Finally, remove the brownies from the oven. Allow them to cool before slicing.
Nut Butter Options
| Nut butter | Flavor in the finished brownie | Notes |
|---|---|---|
| Peanut butter | Classic chocolate peanut butter combination | Most popular choice; flavor comes through clearly |
| Almond butter | Milder and more neutral; lets the cocoa lead | Direct swap; produces a slightly lighter color |
| Cashew butter | Slightly sweet and creamy; least assertive flavor | Direct swap; smoothest texture in the finished brownie |
| Sunflower seed butter | Earthy and slightly savory; nut-free safe | May turn the batter slightly green due to cocoa reaction; harmless |
Tips for the Best Results
Use fully stirred, all-natural nut butter only
All-natural nut butter made from only nuts and salt is essential for this recipe. Conventional nut butters with added hydrogenated oils and sugar produce a different fat content and sweetness level that throws off the texture of the batter and the finished brownie. Stir the nut butter thoroughly before measuring so the oil is fully incorporated and the batter comes together evenly.
Protein powder type affects the texture
Casein protein powder produces the densest, fudgiest finished brownie and is the recommended choice for this recipe. Whey protein produces a softer, slightly cakier texture. Plant-based protein powder absorbs more liquid and may produce a drier batter; add one to two tablespoons of water or milk to the batter if it looks too dry to press flat. All three work, but the finished texture varies by type.
Do not skip cooling
These brownies look and feel underdone at 18 minutes. That is correct. The center is soft and the surface bounces back slightly when pressed. As the pan cools to room temperature, the batter continues to set into a fudgy, sliceable texture. Cutting early produces crumbly squares with a gooey, unset center. One to two hours of cooling time produces the cleanest slices.
Frequently Asked Questions
The protein powder acts as a dry binder in the batter and affects both the structure and the final texture of the brownies. Skipping it produces a batter that is too wet and sticky to hold its shape after baking. Almond flour substitutes at the same amount and produces a similar structure with a slightly nuttier flavor and a softer texture.
Yes. Natural cocoa powder substitutes at the same amount. The finished brownies will be slightly lighter in color and slightly less intense in chocolate flavor. Both work.
Two likely causes: the batter went in before the banana was mashed smooth enough, leaving large chunks that create wet pockets, or the brownies were sliced before fully cooling. Mash the bananas until completely smooth and allow at least one to two hours of cooling time before slicing.
Yes. Slice the cooled brownies and wrap each square individually in plastic wrap. Store in a freezer-safe container for up to 2 months. Thaw at room temperature for 20 to 30 minutes before eating. The texture after thawing is very close to fresh.
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Get the Recipe: 4 Ingredient Flourless Brownies
Ingredients
- 2 ½ cups mashed ripe bananas
- 1 ½ cups creamy all natural nut butter
- ½ cup protein powder
- ¼ cup cocoa powder
- 1 cup dark chocolate chips
Instructions
- First, preheat your oven to 350 degrees Fahrenheit. Line an 8 inch by 8 inch square pan with parchment paper.
- In a mixing bowl, combine the mashed bananas, peanut butter, cocoa powder, and protein powder. Stir until a dough is formed.
- Fold in the chocolate chips.
- Transfer this mixture into the lined pan. Smooth into an even layer.
- Bake for 18 to 21 minutes, or until a toothpick inserted comes out with only a few moist crumbs.
- Finally, remove the brownies from the oven. Allow them to cool before slicing.
Notes
- Use all natural creamy nut butter. It should be made from only nuts and salt. I love peanut butter, almond butter, and cashew butter.
- Use brown spotted ripe bananas for the best flavor.
- These brownies are meant to be gooey. Do not bake too long.
- Store brownies in an airtight container at room temperature for up to 2 days. After that, store in the fridge.