This protein bar recipe combines your favorite vanilla protein powder with bananas, oatmeal, cinnamon and walnuts to make 9 amazingly tasty bars.
Nutrition Facts
  • 204
  • 16
  • 22
  • 7
Notice: Eating the right diet for your goals may result in increased lean muscle and decreased bodyfat.


  • 1.5 Cups Instant Oatmeal
  • 3 Medium Bananas, Mashed
  • 5 Scoops Vanilla Protein Powder
  • 4 Egg Whites
  • 1/2 Cup Walnuts, Ground
  • 1 TBP Vanilla Extract
  • 1 TBP Cinnamon

Cooking Instructions

In a large bowl, add all dry ingredients (oats, protein, walnuts, cinnamon) and stir. In a separate bowl, mash bananas and add egg whites and vanilla and stir. Pour wet ingredients into the bowl with the dry ingredients and combine until evenly mixed.

Scoop mixture into a 9x9 Pyrex dish and bake at 350 degrees F for 15 minutes.

Optional topping: prior to baking, combine a calorie free sweetener such as Stevia, Splenda, Truvia, etc. with some cinnamon. Pour the cinnamon sweetener on top of the mixture, then bake. You may also top with melted dark chocolate after cooling. Makes 9 bars.

Serving Suggestions

Makes 9 bars.

Posted on: Wed, 03/25/2020 - 17:01

Is there any way to include the amount of fiber in the recipes on this site? Thanks!

M&S Team Badge
Posted on: Wed, 08/26/2020 - 12:02

Hey Laura,

Great question! We'll pass this request over to our writers going forward.

Posted on: Sun, 04/24/2016 - 23:28

Do you have a cup or tablespoon conversion for the protein scoop size?

M&S Team Badge
Posted on: Mon, 04/25/2016 - 10:10

That depends on the type of protein powder you use as some have larger serving sizes than others. However, if your protein has roughly a 30-33g serving size then that would equate to roughly 5 tablespoons. If you're looking to use cups, a loose 1/4 cup is roughly the same size as the scoop included with most powders. Unless you're buying in bulk, your protein should have a scoop included.

Posted on: Tue, 01/06/2015 - 22:32

I substituted 1.5c oat flour for the instant oats, 4 instead of three bananas (about 422 grams worth, so medium to large size, 5 scoops of banana protein powder, 4 whole eggs and omitted the walnuts. They did have to cook longer than 20min and I am guessing they took about 40min. I used a 8x8 and they came out way taller than the photo and closer to a banana bread. FYI

Posted on: Sun, 04/27/2014 - 22:39

Just made these, too. They were excellent! I put the bananas in the blender with extra cinnamon and I also beat the egg whites, so they came out moist. Used my pampered chef cookie sheets to bake which are seasoned from so much baking, so they did not stick. You have to know how to bake and modify for your need as with anything else.

Posted on: Wed, 03/26/2014 - 18:10

These are the sh!t! Cooked as directed but added raisins and a little chocolate chips. Also, cooked for 20 instead of 15. I couldn't find my 9x9 pan so I made "protein muffins". Friggin' delish.

Posted on: Sun, 01/05/2014 - 17:51

Stuck to the recipe to the T. Unfortunately, the recipe doesn't say to add oil to the pan. But do, otherwise you'll have a hard time scraping it out and it's a drag trying to wash the dish.

Posted on: Tue, 11/19/2013 - 17:16

Just made these for the first time and added some extra's (goji berries, choc chips, raisins and cherries) i also used porridge oats because i didnt have any instant and was very impressed. The banana came through really well and worked well with the choc chips, will deffinatly be making these again, does anyone know how long they will last?. Thanks for the recipe!

Posted on: Tue, 06/18/2013 - 17:35

Really good. Keeps you full so no naughty snacking.

Posted on: Mon, 05/20/2013 - 16:56

I just made these exactly to the recipie, they were disgusting and went straight in the bin. It came out flat, dry and just tasted like protein powder. Don't bother making them waste of ingredients.

Posted on: Sun, 04/28/2013 - 18:20

I made the banana and walnut bar it was terrible. It was so dry when i took it out of the oven the next day it was like a rock but my dog liked it i thought what a waste of protein powder. Thanks

Posted on: Fri, 03/08/2013 - 19:54

These are great, I used almonds instead of walnuts and 2 bananas instead of 3 to fit my needs better.. They really tasted great !
Im thinking of toying with the recepie alittle by trying chocolate protein and maybe adding some stuff, But I'll be making a batch of these every week from now on.

Posted on: Wed, 02/06/2013 - 20:18

Is this just a 1.5 cups of instant oatmeal or is 1.5 cups of instant oat flour

Posted on: Tue, 02/05/2013 - 15:24

How long they'll keep for? If you see mold, don't eat it.

Posted on: Sat, 02/02/2013 - 08:27

Just wondering how long these will keep for? Anyone know?

Posted on: Sat, 02/02/2013 - 08:24

These were simple to make,not calorific & tasted lovely! I don't like anything too sweet so these were perfect! Will be making these lots ! :D

Posted on: Sat, 02/02/2013 - 08:21

These were simple to make,not calorific & tasted lovely! I don't like anything too sweet so these were perfect! Will be making these lots ! :D

Nick M.
Posted on: Sat, 12/22/2012 - 18:04

Just made these for the first time, but used chocolate powder instead of vanilla. Cooking time seemed a little short (I baked them for 20 min. and they still came out very soft), but they taste great. Definitely an easy and quick recipe worth trying.

Jeff L
Posted on: Fri, 10/19/2012 - 02:22

Wouldnt baking it at 350 denature the protein?

Shawn Henry
Posted on: Mon, 10/15/2012 - 20:42

I assume serving size is one bar but how big are the bars? 1 x 1?

Posted on: Mon, 05/12/2014 - 17:24

welp... if the pan is 9 x 9 and it makes 9 bars, then the bars would be 3 by 3.... math.