Line a muffin tin and preheat oven to 350
Mix pumpkin, sugar, eggs, vanilla, water, and oil together. I added some molasses too just to see how it would taste
Add dry ingredients and mix
To make marbled muffins, melt 1/4 cup of chocolate chips and mix in 1/2 cup of batter. Place some of each mixture into muffin tins and swirl.
Spoon batter into muffin cups and bake until a too thick comes out clean (20-40 minutes). If you want to add a streusel or crumb topping, look at my tutorial for it and just add it on top