Preheat your oven to 350 °F (177 °C) degrees Fahrenheit and prepare muffin tins by lining them with paper liners (24 muffins).
In a large bowl, whisk together the pumpkin puree, eggs, sugar, and vegetable oil until smooth.
Add the flour, baking soda, salt and spices and combine with a rubber spatula until no streaks of flour remain.
Stir in 1 cup of the mini chocolate chips gently.
Portion the batter into each of the 24 prepared muffin cups, distributing the batter evenly.
Top the muffins with the remaining 1/4 cup mini chocolate chips.
Bake at 350 degrees Fahrenheit for about 25 minutes, or until a toothpick inserted into one of the muffins comes out clean.
Cool on a wire rack in their tins for about 10 minutes before removing them from their tins to cool completely.