My Grandma's Oatmeal Cake is an old-fashioned cake made with rolled oats and a delicious coconut almond topping. As they say, “an oldie, but a goodie”!
This recipe comes straight from my grandmother's recipe box, and it's been one of our family's favorites for decades! Other recipes I love that came from my grandmother include: Baked Rice Pudding, Fresh Apple Cake, and Peach Cobbler.
Grandma's Oatmeal Cake
I have so much love for this delicious cake! It's in a league of it's own as far as taste–it's uniquely delicious, and most people haven't tried it before and go crazy for it! I think the best part is the coconut/almond topping that gets broiled at the end. It adds a sweet crunch that pairs so well with the extra moist oatmeal cake.
How to make perfect oatmeal cake:
- Add oatmeal and butter to a bowl and pour boiling water on top. Set aside.
- Combine wet ingredients. In a mixing bowl combine the eggs, brown sugar, and white sugar and beat well.
- Combine dry ingredients. In a separate bowl sift together the flour, cinnamon, baking soda, nutmeg, and salt. Add to the bowl with wet sugar mixture and stir to combine.
- Add oatmeal mixture and stir to combine.
- Bake for about 35 minutes or until a toothpick inserted in the center of the cake comes out clean.
- Make the coconut frosting. While the cake is baking, make the topping by combining all the ingredients in a bowl.
- Broil. Remove the cake from the oven and turn the oven to high broil. Spread the topping evenly over the warm cake and place under the broiler for 2-3 minutes or until the coconut is golden brown.
Making Oatmeal Cake Ahead of Time:
This cake can definitely be made in advance. In fact, it tastes just as good if not better made one day ahead of time. Allow it to cool to room temperature and store it on the counter tightly, covered in tinfoil.
TWO Things that set this recipe apart from the others:
- No quick-cooking oats. You'll notice many recipes call for quick oats. I think true old-fashioned oatmeal cake deserves old-fashioned rolled oats. Plus the texture and flavor are better with rolled oats.
- Coconut Almond topping. I love the flavor and crunch of the chopped almonds in the topping. You could also use walnuts (walnuts were used more often in my Grandma's day), but I like the almonds better for this cake.
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Recipe

Grandma's Oatmeal Cake
Ingredients
- 1 cup old-fashioned rolled oats
- 1/2 cup butter
- 1 1/2 cups boiling water
- 2 large eggs
- 1 cup light brown sugar
- 1 cup granulated sugar
- 1 1/3 cups all-purpose flour
- 1 teaspoon ground cinnamon
- 1 teaspoon baking soda
- 1/2 teaspoon ground nutmeg
- 1/2 teaspoon salt
For the topping
- 6 Tablespoons butter , room temperature
- 1 cup shredded sweetened coconut
- 1/2 cup evaporated milk
- 1/2 cup light brown sugar
- 1 cup nuts
- 1 teaspoon vanilla extract
Instructions
- Preheat oven to 350 degrees F. Grease a 9x13'' pan with non-stick cooking spray.
- Add the oatmeal and butter to a bowl and pour boiling water on top. Set aside.
- In a mixing bowl combine the eggs, brown sugar, and white sugar and mix well.
- In a separate bowl sift together the flour, cinnamon, baking soda, nutmeg, and salt.
- Add to the bowl with eggs and sugars and stir to combine.
- Add the oatmeal mixture and stir to combine.
- Bake for about 35 minutes or until a toothpick inserted in the center of the cake comes out clean.
- While the cake is baking, make the topping by combining all the ingredients in a bowl.
- Remove the cake from the oven and turn the oven to high broil.
- Spread the topping evenly over the warm cake and place under the broiler for 2-4 minutes or until the coconut is golden brown.
Notes
Nutrition
Have you tried this recipe?!
RATE and COMMENT below! I would love to hear your experience.
I originally shared this recipe July 2015. Updated August 2019.
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I am “grandma.” I made this cake monthly (between church potlucks, family dinners, gifts for friends). It was a family favorite for sure. Yes, it keeps well. It seems to become more moist with each passing day, but that’s just fine. Adds to the flavor. Note how easy this is to make. BTW, when I was Suzie Homemaker, we didn’t worry about whether or not our butter was salted or unsalted. In fact, I think I used Crisco if I didn’t have butter. No matter what, it’s a winner. Now I might use a tad less sugar, but I do that for many recipes these days.
Thanks so much for the great feedback!
I’m interested in making this for our Christmas celebration. Would it be possible to make mini cakes or cupcakes instead of one large cake (May family is really into individual sized desserts).
Also, how far in advance can this be made and does it freeze well? Thanks!
Hi Alexandra,
I haven’t tried them in cupcakes but I think it should work fine. Definitely shorten the bake time (about 15 minutes).
Making the cake 1-2 days in advance should be fine. I also think it would freeze ok. I haven’t tried it but I think it will work. The nuts may get a little soft.
So glad to find this recipe!! I have made this cake for years and lost my recipe during a move?. My Mom requested this cake for her birthday. It’s always one of our favorites. If you have a mailing list, please add me to it. Thanks again!!! Jennifer
Can you sub oil for the butter in the me part?
I haven’t tried it to say for sure, but I wouldn’t suggest it for this recipe…sorry!
JI tweak it a bit, the recipe is awesome!
My husband’s favorite cake of all time!
Great recipe! It is very moist and actually is better the second day!
Hi. I wanted to check with you whether you used salted or unsalted butter.
This recipe has salt in it, so it is for unsalted butter. If you want to use salted butter, just reduce the salt by about 1/4 tsp.
Hi I just made this cake for a neighbor. I’ve made it before & I really love it, hope she does too.
My favorite cake for many years! I am going to try making it chocolate. I may just add an amount of coco I think is enough. Wondered what you might do? It going to be a German chocolate cake for father’s day, husband’s request!
Kari
I’m so happy you liked it! Honestly, I wouldn’t recommend making this cake chocolate–I don’t think the flavors would blend together very well. I do have an amazing German Chocolate Cake recipe you may like to try instead. It’s a tried and true family favorite: https://tastesbetterfromscratch.com/german-chocolate-cake/
This popped up on my iPad and I had everything to make it! I’m in love, so moist! My hubby doesn’t do nuts so we used bacon bits on a part of it, I used pecans on the rest. So very good, thanks!