These Apple Oat Muffins are soft, fluffy, and filled with cozy cinnamon spice. The sweet-tart apples and tender oat crumb make them perfect for breakfast, snacks, or a fall baking day.
Prep the Oven: Preheat to 350°F (175°C). Line a 12-cup muffin tin with paper liners or grease lightly.
Mix Dry Ingredients: In a medium bowl, whisk together flour, oats, baking powder, baking soda, cinnamon, nutmeg, and salt.
Make the Batter: In a large bowl, whisk together melted butter, brown sugar, granulated sugar, eggs, vanilla, and milk until smooth.
Combine: Add dry ingredients to wet and fold gently until almost combined. Stir in diced apple (and nuts or raisins, if using).
Bake: Fill muffin cups ¾ full and bake for 18–22 minutes, or until a toothpick inserted in the center comes out clean.
Cool: Let muffins cool in the pan for 5 minutes before transferring to a wire rack.
Notes
Disclaimer: I bake by weight for accuracy. Cup measurements are approximate and may vary depending on how you scoop.Audrey’s Tip: For the best flavor, use a mix of tart and sweet apples—like Granny Smith and Honeycrisp—so you get a balance of bright flavor and natural sweetness in every bite. Also, dice the apples small so they soften evenly and don’t weigh down the muffins.