01 -
Combine rolled oats and whole milk in a medium bowl. Let soak for at least 15 minutes to soften the oats and ensure a moist texture.
02 -
Whisk together the flour, baking powder, baking soda, salt, cinnamon, nutmeg, and brown sugar in a large bowl until well blended and free of lumps.
03 -
Lightly beat the egg in a separate bowl. Add vegetable oil and vanilla extract, mixing until fully incorporated.
04 -
Add the soaked oats and milk mixture along with the wet ingredient mixture into the dry ingredients. Fold gently until just combined to avoid overmixing.
05 -
Fold in the finely chopped Honeycrisp apples evenly throughout the batter.
06 -
Divide the batter evenly into a greased or lined 12-cup muffin tin. Bake at 375°F (190°C) for 18 to 22 minutes, or until a toothpick inserted in the center comes out clean.
07 -
Let muffins cool in the pan for 5 minutes, then transfer to a wire rack to cool completely or serve warm.