With simple, nutritious ingredients and the yummiest apple flavor, this Apple Oatmeal Cake is such a yummy snack or dessert to share. (The Cream Cheese Frosting is optional, but recommended!)
Preheat the oven to 375 degree F. Grease an 8x8-inch baking pan with nonstick spray and line with parchment paper. (A metal baking pan works best here.)
Add all ingredients to a medium bowl. Stir well to combine thoroughly.
Pour into the prepared pan, smoothing evenly.
Bake for 20-24 minutes, or until firm to the touch and lightly golden around the edges. Let cool for about 5 minutes in the pan, then invert onto a wire rack to cool fully.
Frost with Cream Cheese Frosting (if using), then slice, and serve.
Notes
Store leftovers in an airtight container in the fridge for up to a week or in the freezer for up to 6 months. Enjoy cold or warmed slightly.
Use certified gluten-free oats to make this gluten-free.
Use 1/4 cup honey or maple syrup instead of the brown sugar if desired.