Preheat and prep the pan. Heat the oven to 350°F (175°C). Line a 12-cup muffin tin with liners or lightly grease each cup.
Soften the oats. In a large bowl, combine 1 cup milk with 1 1/2 cups rolled oats. Stir and let sit for 10 minutes.
This softens the oats so your muffins are tender, not chewy.
Whisk the wet ingredients. Add 1 cup pumpkin puree, 2 large eggs, 1/3 cup maple syrup, 1/4 cup oil, and 1 teaspoon vanilla to the oat mixture. Whisk until smooth and well combined.
Combine the dry ingredients. In a separate bowl, whisk 1 cup whole wheat flour, 1 1/2 teaspoons baking powder, 1/2 teaspoon baking soda, 1 teaspoon cinnamon, 1/4 teaspoon nutmeg, and 1/2 teaspoon salt.
Bring it together. Add the dry ingredients to the wet. Stir gently with a spatula until just combined.
Don’t overmix—some small lumps are fine.
Add mix-ins if you like. Fold in 1/2 cup chocolate chips, chopped nuts, or raisins. Keep it light to avoid weighing down the batter.
Fill the muffin cups. Divide the batter evenly among the 12 cups. They should be about 3/4 full.
For extra texture, sprinkle a few oats on top.
Bake. Bake for 18–22 minutes, or until a toothpick inserted in the center comes out clean or with a few moist crumbs. Tops should spring back when lightly pressed.
Cool. Let muffins cool in the pan for 5 minutes, then move to a wire rack. This helps prevent soggy bottoms.
Enjoy. Serve warm or at room temperature.
They’re great plain or with a smear of almond butter.