Lazy Daisy Peanut Butter Oatmeal Cake

A simple, old fashioned moist cake filled with creamy peanut butter and oatmeal.  Covered with a cooked brown sugar frosting.  Lazy Daisy Peanut Butter Oatmeal Cake is a cake that’s been around for many generations! 

Lazy Daisy Peanut Butter Oatmeal Cake from #cake

There is nothing lazy about this cake.  

No box cake mix is involved.  Nor, a tub of frosting.

The Lazy Daisy Peanut Butter Cake is considered a vintage cake.  

All made from scratch.

Long before cake mixes were even invented. 

Lazy Daisy Peanut Butter Oatmeal Cake from

My great grandmother would make this cake for special occasions.  I specifically remember having this when I was so little.  Before kindergarten age.  

Sitting in the sun lit kitchen and eating a piece of cake with her, all awhile the other cousins were running around outside.  I some how felt very special sharing my piece of cake with her.

Now, I’ve been making this cake for my boys for the past 20 years… with a few of my own adjustments.

Lazy Daisy Peanut Butter Oatmeal Cake with #cake

Eating this naked cake is just as good…

But, smothering it with the cooked brown sugar frosting is the best! 

Lazy Daisy Peanut Butter Oatmeal Cake with a brown sugar frosting by #cake

Lazy Daisy Peanut Butter Oatmeal Cake
A simple, old fashioned moist cake filled with creamy peanut butter and oatmeal. Covered with a cooked brown sugar frosting. Lazy Daisy Peanut Butter Oatmeal Cake is a cake that’s been around for many generations! Stays fresh up to 3 days. Keep covered.
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  1. 1 cup old fashioned oats
  2. 1 1/2 cups boiling water
  3. 1/2 cup butter
  4. 1 cup brown sugar
  5. 1 cup granulated sugar
  6. 1/2 cup creamy peanut butter
  7. 2 eggs
  8. 2 teaspoons vanilla extract
  9. 1 3/4 cup all purpose flour
  10. 3 tablespoons cornstarch
  11. 1 teaspoon baking soda
  12. 1 teaspoon baking powder
  13. 1/2 teaspoon salt
  1. 1/2 cup butter
  2. 1 cup brown sugar
  3. 1 teaspoon vanilla extract
  4. 1/2 cup heavy whipping cream, divided
  5. 3 cups confectioners powdered sugar
  1. Stir oats in with the boiling water and let stand for 20 minutes.
  2. Combine flour and cornstarch in a sifter and sift 3 times.
  3. In a medium bowl, add and whisk in the baking soda, baking powder, and salt in with the flour mixture. Set aside.
  4. In a large mixing bowl, cream together 1/2 cup butter, 1 cup brown sugar, 1 cup granulated sugar, and peanut butter for 3 minutes. Scrape down the sides and add the eggs one at a time.
  5. Add the oatmeal to the creamy mixture.
  6. Slowly add the flour mixture until all combined. Do not over mix.
  7. Bake in a greased, floured 9 inches by 13 inches baking pan for 45 to 50 minutes at 350 degrees.
  8. Allow to cool before frosting the cake.
  1. Melt and boil 1/2 cup butter and 1 cup brown sugar for 2 minutes. Whisk the entire time.
  2. Add 1/4 cup heavy cream and boil for another 2 minutes. Continue whisking.
  3. Remove from heat and cool slightly.
  4. Put into a mixing bowl and add 1 cup at a time of powdered sugar. Alternating 1/4 cup of heavy cream with the powdered sugar.
  5. Whip on high speed for one minute.
  6. Frost cake.
  7. Enjoy!
  1. Stick a toothpick in the middle of cake to test if done baking. If the toothpick comes out clean, the cake is done.
Simply Gloria
Lazy Daisy Peanut Butter Oatmeal Cake with #peanutbutter

For another peanut butter idea for a cake, try this one!

Peanut Butter Cake - Simply Gloria #peanutbutter

Peanut Butter Cake with Peanut Butter Frosting

 Enjoy, my friends!

What was your favorite past time treat growing up?

I’m sharing this piece of Lazy Daisy Peanut Butter Oatmeal Cake with:
Roubinek Reality
I Heart Naptime


    • says

      Marcie, I love the taste of a homemade cake over any box mix. I remember when they were soooo trendy to use… as cakes. Now, there’s so much more to do with a cake mix!

    • says

      Thank you, Chelsea! I’m surprised my heart plate is still hanging around… it’s over 20 years old and have been my boys’ favorite plate all through the years. (And, that’s a lot of years!)

  1. says

    This cake looks incredible Gloria! I love that you are sharing your great grandmother’s recipe and the special memories you have eating this with her 🙂 Makes this cake that much more special and it sounds amazing wit the peanut butter and oats and that thick brown sugar frosting looks heavenly! Pinning:)
    Kelly recently posted…Red Velvet Valentine MacaronsMy Profile

    • says

      Julianne, that was a lot of fun! Did you hear (or see) on the news how much snow we got while you were down in the valley… where it was raining?! It was crazy! Looks like you got a lot of info down there at the conference. Wish I could have kept my ticket…. 🙂

    • says

      Funny thing is, Elizabeth, is that the oatmeal totally disappears! At least that are the words when my son helped me bake this. I’m a frosting kind of girl, too! So, you would really dig this frosting!

  2. says

    This cake looks fantastic! I can’t wait to try it out. Stopping by from SITS Girls Comment Love Tribe. Your photos are beautiful – what type of camera are you using? I’m in the market for a new one, and I’m taking all kinds of recommendations. Between the photos and the recipes … new follower! Have a great day.
    Gailyc recently posted…Cleaning HouseMy Profile

    • says

      Thank you so much, Gailyc! I’m using the Canon T3i with the 50mm lens. I’ve been just winging it. I purchased the same camera for my oldest son 3 years ago when it came out. And, since I have no patience to read the manual… he has been giving me the low down. I bought mine off Amazon… they usually always have a great package deal! Let me know what kind you get… 😉
      Hope you’re having a great weekend!

    • says

      Laura, my sister is the same way when it comes to chocolate. In fact, when it comes to migraines, have you had your son use Past Tense Essential Oil (I use “do TERRA”)? I’m just letting you know that it has been the best thing EVER for me. My bro-in-law swears by this, too. We’d both go in to get botox(!) to help with the migraines… but this really works.
      Have a great weekend!

    • says

      You’re so funny, Heather! You are not the only one that is behind… I’m playing catch up today! So happy you stopped by to come say hi to little me! 😉


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