Preheat your oven to 375°F (190°C) and get your muffin tin ready. I usually line mine with paper liners for an easy cleanup and a cute look, but if you want to skip the liners, a quick spray of non-stick oil does the trick just as well.
Whisk together the pumpkin purée, vegetable oil, brown sugar, granulated sugar, eggs, and vanilla extract in a big bowl until smooth. Don’t worry if the mixture isn’t completely smooth, a few lumps here and there help keep the muffins nice and moist.
In a separate bowl, sift or whisk your flour, baking powder, salt, cinnamon, and nutmeg. This step might seem small, but it’s the secret to a light and fluffy texture with that perfect cozy fall flavor.
Now, pour about half of the dry ingredients into your wet mixture and fold it gently using a spatula. Then add the rest and fold again just until everything comes together. This slow, gentle folding keeps the batter airy and avoids overmixing, which can make muffins tough.
Time for the chocolate chips! Fold almost all of them into the batter carefully, saving a small handful to sprinkle on top later for that irresistible melty chocolate look.
Spoon the batter into muffin liners, making sure each is filled to three-quarters capacity. Give the pan a gentle knock on the countertop to even out the batter and release air pockets for a smooth finish.
Transfer the pan to the oven and let it bake for around 18 minutes. Once baked, let the muffins rest in the pan for about 7 minutes. This helps them firm up enough to come out cleanly without breaking.
Then transfer them to a wire rack to cool completely or enjoy them warm if you can’t wait.