This old-fashioned oatmeal cake is a cozy classic—oats are softened in boiling water, then baked into a moist spice cake and finished with a warm brown sugar frosting with coconut and nuts. It’s delicious served warm or cold.
Let the oats soak first, then bake until set and fragrant. The bubbly topping goes on at the end for that signature vintage finish.
🥣 Classic Oatmeal Cake
A moist, comforting cake with a delightful chew from the oats, topped with a rich, bubbling coconut-nut frosting.
Soak: Pour boiling water over oats, cover, and let stand 20 mins.
Batter: Grease and flour an 8×12-inch pan. Cream butter with sugars until fluffy; blend in vanilla and eggs. Stir in the oat mixture. Add sifted dry ingredients; mix well.
Bake: Pour into pan and bake 50–55 mins at 350°F.
Frost: Combine frosting ingredients and boil until bubbly. Spread over the cake.
Oatmeal Cake FAQ
Why do the oats sit in boiling water first?
Soaking softens the oats, helping the cake bake up moist and tender.
Can I use quick oats?
Yes—quick oats usually work fine here. The soak step helps either way.
Is the frosting cooked?
Yes. The frosting is boiled until bubbly, then spread over the cake for a rich brown-sugar topping.
How should oatmeal cake be stored?
Store covered at room temperature for 1–2 days, or refrigerate for longer freshness.
