Preheat the oven to 375º Fahrenheit.
In a medium bowl, whisk together the flour, sugars, salt, baking soda and spices. Set aside.
In another bowl, whisk together the pumpkin, eggs, canola oil and vanilla extract.
Pour the wet ingredients into the dry ingredients and stir together. Do not over mix, just stir until everything is incorporated into the batter. Fold in the chocolate chips.
Scoop batter into the paper liners, about ¾ full. Sprinkle the remaining chocolate chips over the batter.
Bake muffins for 20-22 minutes or until a toothpick inserted into the center of a muffin comes out clean.
Combine ingredients for icing and drizzle over muffins.