This recipe is a Hungry Girl recipe and should be credited as so. They have had multiple recipes for these 2 ingredients for many years.
I did the following based on the two ingredient principle: one box vanilla cake mix; one large 29 oz can pumpkin purée, two tablespoons cinnamon and one teaspoon vanilla. The pumpkin flavor comes through and the muffins I made were doubled to 24 delicious mouth-poppers.
These were very easy and tastier than expected. Very good for people following a low fat, low cholesterol diet. The batter is quite thick, so I think mixing by hand is useful only if your arms are really strong!
I have been making these muffins for years. Excellent recipe. I found adding unsweetened applesauce makes the extra moist with diluting the pumpkin flavor or adding calories.