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.
CONSIDER TRYING THESE POPULAR “OLD-FASHIONED” DESSERTS:
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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 was wondering if I could add preserved (canned) peaches, rum raisins and pecans to this recipe? Some measurements and any additional information/advice would be really appreciated. Thank you so much for amazing recipe after amazing recipe! This is my GO TO SITE for everything home made from scratch. I get soooo many requests for repeats and my recipe. Thank you a million times xoxo.
You absolutely can—those sound like dreamy add-ins! 😍 I’d recommend:
– About 1/2 cup well-drained canned peaches, chopped small (you don’t want extra moisture sinking the cake)
– 1/3 to 1/2 cup rum raisins (you could even soak ‘em in a splash of rum or warm water first to plump them!)
– 1/2 cup chopped pecans, folded into the batter or sprinkled with the topping
Just keep the total mix-ins to around 1 to 1.25 cups so the cake doesn’t get weighed down. And maybe tent with foil if it needs a few extra minutes baking time.
And THANK YOU for the kindest words 🥹 Seriously means the world to all of us. So happy it’s become your go-to from-scratch spot ❤️
I have this recipe from GH since 1989!
I love to make on a cold rainy or snowy day!
Since just me and my husband now I cut recipe in half and make 8×8 and just as good!
I had this cake for the first time in a restaurant and loved it so much that I Googled old fashioned oatmeal cake so that I could make it at home. This was the perfect recipe and the entire cake was demolished. Will definitely make again!
Just made this cake and it smell divine!! Hoping it’s cooled down enough after dinner. Thank you for sharing. Can’t wait to dig in!
This is my mom’s old recipe!
I made it today! Our family always loved it, moist, substantial, sweet, with crunch on top!.
Just becareful not to leave it under the broiler too Long! It can burn!
Thank you, Lauren!
I followed the recipe exactly and the cake turned out nothing like the picture. It was thin and very dense. No fluff to it. I won’t be making it again.
Mine too. I made it last night.