Oatmeal Apple Cake Recipe tastes like a cross between a cozy apple crisp and a tender coffee cake, with chewy oats, soft apples, and warm cinnamon in every bite. It suits busy home bakers who want a not-too-sweet dessert or snack that comes together in about 1 hour from start to finish. I baked a version of this on a Tuesday night in sweatpants, so you can absolutely pull it off in real life too.
Why You Should Try This Oatmeal Apple Cake Recipe
This Oatmeal Apple Cake Recipe gives you all the comfort of apple pie without the fuss of rolling crust. The oats add hearty texture, the apples stay juicy, and the cinnamon-sugar top bakes into a lightly crisp, crackly layer.
You mix everything in simple bowls, no mixer needed, so cleanup stays easy. The cake tastes great warm, at room temperature, or cold from the fridge, which makes it perfect for breakfast, snack, or dessert.
“This Oatmeal Apple Cake Recipe tastes like fall in a pan and disappears faster than any dessert I bring to potlucks. ★★★★★”
Ingredients You’ll Need
Dry ingredients
- 1 cup old-fashioned rolled oats
- Use old-fashioned, not instant, so the cake keeps structure and chew.
- 1 cup all-purpose flour
- I like King Arthur or Gold Medal for consistent results.
- 1 teaspoon baking powder
- 1/2 teaspoon baking soda
- 1 teaspoon ground cinnamon
- 1/4 teaspoon ground nutmeg (optional but tasty)
- 1/2 teaspoon fine sea salt
Wet ingredients
- 1 cup buttermilk, room temperature
- Shortcut: mix 1 cup milk with 1 tablespoon lemon juice or white vinegar, rest 5 minutes.
- 1/2 cup neutral oil (canola, vegetable, or light olive oil)
- 2 large eggs, room temperature
- 3/4 cup light brown sugar, packed
- 1 teaspoon pure vanilla extract
Apples and mix-ins
- 2 medium apples, peeled and chopped small (about 2 cups)
- Use firm apples like Honeycrisp, Granny Smith, Pink Lady, or Fuji.
- 1/2 cup chopped walnuts or pecans (optional)
- Toast them lightly in a dry skillet for extra flavor.
- 1/3 cup raisins or dried cranberries (optional)
Topping
- 2 tablespoons light brown sugar
- 1 tablespoon granulated sugar
- 1/2 teaspoon ground cinnamon
- 2 tablespoons cold unsalted butter, cut into tiny cubes
Equipment
- 8-inch or 9-inch square baking pan (metal or glass)
- Parchment paper or nonstick spray
- 2 medium mixing bowls
- Whisk and rubber spatula
- Measuring cups and spoons
- Small knife and cutting board
- Toothpick or cake tester
Tips & Tricks
- Line the pan with parchment and leave a little overhang so you lift the cake out easily.
- Chop apples into small, even pieces so they bake through and spread nicely in the batter.
- Use room temperature eggs and buttermilk so the batter mixes smoothly and bakes evenly.
- Stir the batter gently once you add the flour so you avoid a tough, dense cake.
- Taste a tiny apple piece and adjust cinnamon or nutmeg if you want extra spice.
- Add nuts only if everyone enjoys them; keep them on top instead of inside for easier removal.
- Let the cake cool at least 20 minutes before slicing so it holds shape and cuts cleanly.
- Serve warm with yogurt for breakfast or with vanilla ice cream for dessert to keep everyone happy.
How to Make Oatmeal Apple Cake Recipe
Step 1: Prep the pan and soak the oats
Preheat the oven to 350°F. Grease an 8-inch or 9-inch square pan and line it with parchment if you want easy removal. In a medium bowl, mix the rolled oats and buttermilk, then set the bowl aside while you prep the rest so the oats soften.
Step 2: Mix the dry ingredients
In another bowl, whisk the flour, baking powder, baking soda, cinnamon, nutmeg, and salt. Break up any brown sugar-like clumps in the flour with your fingers if you see them. Keep this bowl nearby so you add it quickly when you finish the wet mixture.
Step 3: Combine the wet ingredients
Add brown sugar, oil, eggs, and vanilla to the oat and buttermilk mixture. Whisk until the mixture looks smooth and slightly thick. Scrape the sides and bottom of the bowl so no sugar hides in the corners.
Step 4: Add dry ingredients and fold in apples
Pour the dry mixture into the wet mixture. Use a spatula to fold gently until only a few streaks of flour remain. Add chopped apples, nuts, and raisins if you use them, then fold again until everything looks evenly distributed and no dry spots remain.
Step 5: Make the cinnamon sugar topping
In a small bowl, stir together brown sugar, granulated sugar, and cinnamon. Sprinkle this mixture evenly over the top of the batter in the pan. Dot the top with the tiny cubes of cold butter so they melt into a lightly crisp, flavorful crust.
Step 6: Bake the cake
Place the pan in the center of the oven. Bake 30 to 38 minutes, depending on pan size and apple juiciness, until a toothpick inserted in the center comes out with a few moist crumbs but no wet batter. Rotate the pan once in the last 10 minutes if your oven heats unevenly.
Step 7: Cool and serve
Set the pan on a wire rack and let the cake cool at least 20 to 30 minutes. Lift the cake out by the parchment or cut it directly in the pan into squares. Serve warm, at room temperature, or chilled, with a spoonful of yogurt, whipped cream, or a scoop of vanilla ice cream.
What to Serve with Oatmeal Apple Cake Recipe
Serve this Oatmeal Apple Cake Recipe warm with a scoop of vanilla ice cream for a classic dessert that tastes like apple crisp in cake form. For breakfast or snack, pair a square with Greek yogurt and a drizzle of honey. A mug of hot coffee, chai, or spiced herbal tea fits perfectly with the cinnamon and apple flavors. Kids usually love it with cold milk and a little extra apple slices on the side.
Storage Options
- Store leftover Oatmeal Apple Cake Recipe covered at room temperature for up to 2 days.
- Keep it in an airtight container in the fridge for up to 5 days for the best texture and flavor.
- Freeze individual squares tightly wrapped, then placed in a freezer bag, for up to 2 months.
- Reheat slices in the microwave for 15 to 25 seconds or in a 300°F oven for about 8 to 10 minutes until warm and soft.
Oatmeal Apple Cake Recipe
Ingredients
Instructions
- Preheat the oven to 350°F (175°C). Grease an 8-inch or 9-inch square baking pan and line it with parchment paper if desired for easy removal.
- In a medium bowl, combine the rolled oats and buttermilk. Stir to moisten the oats and set aside so they soften while you prepare the rest of the batter.
- In another bowl, whisk together the flour, baking powder, baking soda, ground cinnamon, ground nutmeg (if using), and salt until well combined.
- To the bowl with the soaked oats and buttermilk, add the brown sugar, oil, eggs, and vanilla. Whisk until the mixture is smooth and slightly thick, scraping the sides and bottom of the bowl as needed.
- Add the dry ingredient mixture to the wet ingredients. Use a spatula to fold gently just until a few streaks of flour remain.
- Fold in the chopped apples, and add the nuts and raisins or dried cranberries if using, stirring just until everything is evenly distributed and no dry spots remain. Spread the batter evenly into the prepared pan.
- In a small bowl, stir together the brown sugar, granulated sugar, and cinnamon for the topping. Sprinkle this mixture evenly over the surface of the batter, then dot the top with the tiny cubes of cold butter.
- Bake in the center of the oven for 30 to 38 minutes, depending on pan size and the juiciness of the apples, until a toothpick inserted in the center comes out with a few moist crumbs but no wet batter. Rotate the pan once during the last 10 minutes if your oven bakes unevenly.
- Place the pan on a wire rack and let the cake cool for at least 20 to 30 minutes. Lift the cake out using the parchment or slice directly in the pan into squares. Serve warm, at room temperature, or chilled, plain or with yogurt, whipped cream, or vanilla ice cream.
Notes
Approximate per serving (1 of 9): 270 calories; fat 13 g; saturated fat 3 g; carbohydrates 35 g; fiber 2 g; sugars 19 g; protein 5 g; sodium 260 mg. Values will vary based on specific ingredients, optional add-ins, and portion size.