Skip to Content

Oat Squares (courtesy of WilliamB!)

Hey everyone! In yesterday’s Five Frugal Things post, WilliamB mentioned making oat squares (promising that they are even easier than my spread-in-a-pan granola!), and multiple readers were wanting the recipe.


Luckily, WilliamB sent it to me in an email last night, so I’m just copying and pasting it here for you guys. By the way, as long as you use gluten-free certified oats, this should be safe for gluten-sensitive people to eat!

Apple Oat Squares (9×13 pan)

The original is from Kitchn

I’ve modified it by using honey (or, once, leftover failed apple cider caramels, aka cider caramel sauce) instead of maple syrup, on the theory that the maple syrup flavor wouldn’t shine as it deserves to, and homemade applesauce instead of storebought. I also left off the apple chunks which The Kitchn spreads across the top.

jars of applesauce

The recipe is dirt easy and not sweet, a good breakfast or snack with staying power. You can top with PB for some protein to go with, or jam for some sweetness.

I found them a little dry so I modified the recipe to make sandwiches. I cut the recipe in half, bake it thin, cut the batch in half, spread PB on one half, top with the other half, squish it down, cut into serving pieces.

This is the halved recipe; for thicker ones, double the below. If you do that, you could add nuts or choc chips for a sweeter version.

160g (2 cups) rolled oats
40 g (1/2 cup) rolled oats, buzzed to flour in a blender
1/2 tablespoon cinnamon
1 t. baking powder
1/4 t. salt
1/2 c. applesauce
1 egg
1/4 c. maple syrup, honey, or other liquid sugar
optional peanut butter

Preheat oven to 350° F.
Mix oats, cinnamon, baking powder, and salt.
Add the applesauce, egg, and liquid sugar.
Pat evenly into a greased 9×13″ pan.
Bake at 350° F till done. About 10 minutes; one way to tell is that the edges will pull away a bit from the pan, although it’ll be soft to the touch.

optional: make PB sandwiches by cutting in half, spreading one half w PB, top with other half, cut.

Again, if you want to make the full-thickness bars, the original recipe is on The Kitchn.


And now I’m hungry for something made with oats. 😉 So, I’m including a list of other oat-based recipes for you to try as well.

Oatmeal Recipes

This site uses Akismet to reduce spam. Learn how your comment data is processed.


Wednesday 13th of March 2024

Thank you WilliamB, for sharing the recipe. I've been looking for a snack to bring to work that's a bit healthier and cheaper than the options available near my office. Can't wait to try them! Thank you Kristen, for the repost of the other oatmeal recipe links. I mentioned the dark chocolate oatmeal to my husband the other day and was meaning to search for it. Sounds decadent!

Amanda in VA

Wednesday 13th of March 2024

This is helpful as I have a giant cylinder of oatmeal to use up, and I'm not a fan of oatmeal. Thank you to you both.


Wednesday 13th of March 2024

@Amanda in VA, You can also use oatmeal in meatloaf and meatballs. Also in streusel topping.

Elaine N

Wednesday 13th of March 2024

Thank you to WilliamB and Kristen for this recipe. Mr. N loves home made cookies a bit too much and I have been looking for a low-sugar substitute. This looks like a great option.

Rebekah in SoCal

Wednesday 13th of March 2024

This looks similar to a Baked Oatmeal recipe that I love. I tell my nieces that it is breakfast cake.

Ruth T

Wednesday 13th of March 2024

Thanks for sharing the recipe! I've been looking for something or this to use for after-school snacks.

This site uses Akismet to reduce spam. Learn how your comment data is processed.