Preheat oven to 375 degrees and line muffin pans with liners.
In a large bowl, add beat eggs. oil, milk, water, vanilla, and beat .
Stir in sour cream, and then add cake mix and pudding mix. Do not over mix.
Stir in 2 cups chocolate chips and fill muffin liners about ¾ full. Drizzle a few of the other 1/2 cup chocolate chips over each muffin. (If you run out that's ok they are chocolately enough!)
Bake for about 18 minutes or until a toothpick comes out clean.
Remove from muffin pans and let cool . Store in an airtight container or airtight bag and freeze some for later.