Low Calorie Chocolate Brownie Protein Bar Recipe

Here is a homemade chocolate brownie protein bar recipe which is low in sugar and only 100 calories per slice. It is also costs peanuts to make a large batch of these which is a great way to save money and prep for the week.

Protein bars can be very convenient when you are looking for a healthy snack before or after the gym, or if you are looking for a chocolate bar alternative at your desk.

In this recipe, you can make 14 chocolate protein bars which you can keep in your fridge and eat on the go.

Why you will love these chocolate brownie protein bar recipe?

  • Super cheap to make and great way to save money buying protein bars.
  • Only 100 calories per protein bar and low sugar.
  • Takes just 10 minutes to prep.
  • Alternative to drinking protein shakes or eating chocolate bars.

If you love these protein bars, why not try:

How to make chocolate brownie protein bars?

1) Main ingredients

  • Protein Powder: I used PhD chocolate brownie protein powder for this recipe as this is great for making protein recipes like chocolate brownies, mousse and even ice cream, however you can use regular chocolate whey protein powder if you have that.
  • Bananas: As always, you cannot go wrong with mashed bananas for these types of recipes. Most protein recipes will look good on paper but taste horrible and bland. Using a sweetener helps and mashed bananas are a great alternative to regular granulated sugar.
  • Nut Butter: Either peanut butter or almond butter is good for these protein bars as they add additional protein and healthy fats, as well as flavor.

2) Method

Mashed banans in a mixing bowl

Prep the mashed bananas. Perfect if you have leftover bananas.

All other ingredients in mixing bowl

Add the main ingredients to the mixing bowl. You have an opportunity to add more ingredients.

Example of the chocolate brownie protein powder which was used for this recipe

I used chocolate brownie protein powder for this recipe, however you can use regular whey chocolate protein powder.

Adding chocolate chips to the mixing bowl

I added plenty of chocolate chips!

Adding the chocolate brownie mixture to the baking tray

Here is what the chocolate brownie mixture should look like before you bake it in the oven.

How it looks after it has been cooked. Slicing the brownies into 14 bars.

You can make plenty of protein bars. As this is portion controlled, the calories are low.

3) Storage tips

Keep these stored in an air-tight container or freezer bag in the fridge for 7-10 days. It might keep well for longer but I would not know because they are usually all gone by then. I have kept these for more than a week, and they have been fine.

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Chocolate Brownie Protein Bars

  • Author: Mani
  • Prep Time: 10 minutes
  • Cook Time: 25 minutes
  • Total Time: 35 minutes
  • Yield: 14 protein bars 1x
  • Diet: Low Calorie


Learn how to make your own chocolate brownie protein bars in a large batch. Low in calories, low in sugar, cheap to make and healthy.



  • 60g of PhD Smart Protein Chocolate Brownie
  • 80g Peanut Butter
  • 3 Bananas, mashed
  • 2 Eggs
  • 2 tsp Almond Milk, or milk alternative
  • 25g Cocoa Powder
  • 2 tbsp Chocolate Chips
  • 1 tsp Vanilla Extract
  • 1 tsp Baking Powder
  • 1 Lemon, juice and zest
  • 1/2 tsp Salt
  • 1 tsp Coconut Oil, or alternative


  1. To a mixing bowl, add the protein powder, cocoa powder, mashed bananas, peanut butter, eggs, vanilla extract, baking powder, lemon juice and salt. Stir vigorously and add almond milk as you go along.
  2. Once it reaches a smooth texture, add the chocolate chips.
  3. Line your baking tray with parchment paper and add coconut oil.
  4. Add the chocolate brownie mixture to the baking tray.
  5. Bake for 25 minutes on 200°c / 400°f.
  6. Remove from oven and allow to stand for 5 minutes.
  7. Slice into 14 protein bars.
  8. Keep stored in an air-tight container and keep in fridge to 7-10 days.
  • Category: Snack
  • Method: Bake
  • Cuisine: American


  • Serving Size: 1 protein bar
  • Calories: 100 kcal
  • Sugar: 4.9 g
  • Sodium: 195.3 mg
  • Fat: 4.8 g
  • Saturated Fat: 1.5 g
  • Unsaturated Fat: 0.4 g
  • Carbohydrates: 10.2 g
  • Fiber: 1.8 g
  • Protein: 5.4 g
  • Cholesterol: 27.3 mg

Frequently asked questions

How to make these protein bars vegan-friendly?

You will need to use a vegan chocolate flavor protein powder and use flax eggs instead of regular eggs.

Are these protein bars keto-friendly?

Each slice is 10.2 grams of carbohydrates with 1.8 grams of fiber. This will not do harm if you are on a keto diet but remember this is just one slice. You could use a calorie free sugar replacement to keep the carbohydrates low.

I do not have bananas, what else can I use?

The mashed bananas are used to sweeten the chocolate brownie bars and add flavor. You can another sweetener such as honey, maple syrup or a calorie-free sweetener like stevia.

Are chocolate brownie protein bars good for you?

These bars can be good for you in many ways. For example, if you are looking to lose weight, these bars are low in calories and carbohydrates which can be a good replacement for chocolate bars. These can also be good for you if you are regularly working out or going to the gym by providing you energy pre or post workout.

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