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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Do you think I could leave out the nuts? Or is there something else you’d recommend in their place? My son is allergic to all nuts but peanuts. Thank you!
Yes, you can leave them out. Enjoy!
Recipe was excellent. It’s a snowy cold day here and this was on point to warm us up for an evening snack. It was 10 out of 10 perfect. I’m sure almonds would be wonderful but I’d love pecans so I use them. And I did not have evaporated milk on hand but I did have coconut milk on hand so I just replaced that I’m probably added just a couple of more tablespoons actually. But nonetheless either way I’m sure the recipe is as perfect as what I ended up with. I will be making this forever. Thank you for sharing.
I love this recipe. It was so easy. I didn’t have baking soda so I substituted 3 teaspoons of baking powder and it came out delicious . Thank you for sharing it.
This was so easy to make. And smells Devine! I’m taking it to a family dinner tomorrow and can’t wait to try it and get their reaction! Smells just like autumn has arrived!
Hi, do you think I can sub evaporated milk with something else? Am dairy intolerant and would really love trying this out!
Sure, a dairy free milk should be fine!
Are use coconut milk and it was wonderful.
This was my Mom’s go to cake for camping! Because it tasted as good the first day as the last. Now that she is gone I make it for special events when my sibs get together! Our favorite!
The recipe calls for all-purpose flour, but no baking powder? Isn’t it too heavy?
It’s not heavy. It’s quite similar consistency to most cakes.
The recipe has baking soda which is a leavener and will help the cake rise. Baking powder is just a mixture of baking soda and an acid.
This was delicious! I’m trying to use up some oats in our food storage, so this was great. We ate it warm with some vanilla ice cream. Thank you!
This is very much like the oatmeal cake my grandmother made.
I am really pleased to have found such a similar recipe!
Had it halfway put together and realised no coconut, just added more almonds to the topping! Turned out fantastic!
I have been making this cake since I was 10 I am now 71. Great cakes last a lifetime
Baking right now
Can not wait for this cake
Thank you